US20030203707A1 - Method for removing surface coatings - Google Patents
Method for removing surface coatings Download PDFInfo
- Publication number
- US20030203707A1 US20030203707A1 US10/421,605 US42160503A US2003203707A1 US 20030203707 A1 US20030203707 A1 US 20030203707A1 US 42160503 A US42160503 A US 42160503A US 2003203707 A1 US2003203707 A1 US 2003203707A1
- Authority
- US
- United States
- Prior art keywords
- coating
- particulate solid
- spray
- mixture
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
- B24C11/005—Selection of abrasive materials or additives for abrasive blasts of additives, e.g. anti-corrosive or disinfecting agents in solid, liquid or gaseous form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
- B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
- B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
Abstract
A method of removing a coating, such as paint, varnish, biological growth or grime, from a surface, the method comprising selecting a suitable particulate solid having a particular size of from 150-250 mm, and a fluid carrier to form a spray mixture and spraying the mixture as a jet spray so as to impact and at least partially remove the coating. The hardness of the particulate solid is less than 8.0 on the Moh scale. The pressure applied to the spray mixture to generate the spray is from 3x105 to 1.5x106 Nm−2. An apparatus comprising a blasting post and a compressor to generate the spray mixture and propel it from a nozzle is also disclosed. Heat may be applied to the carrier, either prior to or when mixing with the particulate solid.
Description
- This is a continuation of pending U.S. patent application Ser. No. 09/857,513.
- The invention relates to removing coatings from a surface and more particularly to removing paint, varnish or biological growth from the outer hull of a boat.
- The removal of a layer or layers from a surface by impacting an abrasive material against the layer or layers is well known, For example, grit or sand-blasting has been used for many years to clean stone buildings, painted metal surfaces such as railings and superstructures including oil rigs. The particles of writ or sand are mobilised by means of a carrier fluid, normally air or water.
- The commonly used methods suffer from the drawback that damage is often caused to the material beneath those layers being removed. This is especially true where the methods are employed to remove surfaces from a relatively soft material such as wood or fibre glass. In particular, where fibre glass is being cleared, damage can be caused to the gel coat layer. The problem of damage caused is particularly acute where, for example, antique wooden objects are being cleaned or where the surface is part of a boat. German patent application DE 19522001 (MINERALIEN WERKE) discloses the use of a mixture of solids, one of the solids having a higher density than the other. in order to clean and treat sensitive or polished surfaces such as brick or marble
- Where water is used as the carrier fluid, then its consumption using conventional methods is often quite high. Where there is a ready supply of water high consumption may not be a problem but where, due to the remoteness of a source, the water needs to be transported to the object to be cleaned, minimisation of water consumption would be advantageous.
- It is an object of the present invention to provide a method which alleviates the above disadvantages, It is a further object of the present invention to minimise the usage of the carrier fluid when said fluid is a liquid.
- In accordance with the invention there is provided a method of removing a coating such as paint or varnish from a surface, the method comprising:
- (i) selecting a particulate solid suitable for removing the coating from the surface, the particulate solid having a particle size from 150 to 250 μm;
- (ii) selecting a fluid as a carrier for the particulate solid;
- (iii) distributing the particulate solid in the fluid to form a spray mixture;
- (iv) generating a pressurised jet of the spray mixture;
- (v) impacting onto a coating, the pressurised jet of spray mixture to remove the coating.
- Preferably, the particle size is from 170 to 190 μm.
- The hardness of the particulate solid is preferably less than 8.0 on the Moh scale. It is particularly preferable for the hardness to be 6.0 to 7.0 on the Moh scale. The preferred particulate solid is olivine.
- In one arrangement, the method includes heating the carrier fluid.
- The fluid is preferably a liquid. It is particularly preferable that the liquid used is water.
- The temperature of the liquid is preferably maintained below 50° C. It is particularly preferable that the liquid is heated to a temperature between 25 and 40° C.
- The solid to liquid ratio in the jet spray is preferably approximately 2 to 1 volume for volume.
- The jet advantageously is directed to impact the coating at an angle of approximately 45°.
- In use the jet is moved—preferably in a circular motion—back and forth across the coating to be removed.
- The pressure of the jet is advantageously from 3x105 to 1.5x106 Nm−2 and preferably from 4x105 to 1x106 Nm−2.
- The present invention will now be described more particularly with reference to the accompanying drawing which shows, by way of example only, apparatus for removing a coating from a surface in accordance with the method of the invention. In the drawing;
- FIG. 1 is a diagrammatical view of the apparatus.
- Referring initially to FIG. 1, an apparatus, suitable for use in the method detailed below, comprises a blasting pot1 and a
compressor 2. Compressed air is passed from thecompressor 2, via aninlet valve 3 to the blasting pot 1. Water is supplied to the blasting pot via aninlet pipe 6. The blasting pot 1 also comprises anoutlet pipe 7. Theoutlet pipe 7 has at its distal end anozzle 5. Flow of material to thenozzle 5 is controlled by means ofoutlet valve 4. - In the method according to the invention a spray mixture of olivine and water from the domestic supply, at ambient temperature, is charged to the blasting pot1. Compressed air at a pressure of approximately 7x105 Nm−2 from the
compressor 2 is then passed through theinlet valve 3 and pressurises the blasting pot 1 up to approximately 12x105 Nm−2. - When a suitable pressure has been reached in the pot1, the pressure can be released when required by opening the
outlet valve 4 which is attached to thenozzle 5. Thenozzle 5 is approximately 15 cm long with an outlet diameter of approximately 1.9 cm. The excess pressure forces the spray mixture of olivine and water out of the pot 1 and through thenozzle 5 at a pressure, often called the blast pressure, of approximately 6x105 Nm−2. - When the spray mixture is ejected through
nozzle 5 and directed against the surface coating as described hereinbelow, it acts to abrade the coating and remove it whilst leaving the surface beneath the coating relatively undamaged and ready to be treated or for a new coating to be applied. Where necessary, a constant water feed may be introduced via theinlet pipe 6. - The
nozzle 5 can either be directed by hand or remotely. When directed by hand, the nozzle is held such as to deliver the abrading spray mixture at an angle to the coated surface. The angle is usually approximately 45°. - The distance the nozzle is held from the surface will vary according to the conditions under which spraying is being carried out, the mixture being sprayed and the coating being removed A distance of approximately 50 cm has been found to give good results for a variety of coatings.
- Although a coating can be removed by simply passing the nozzle across the surface in a single sweeping action, a number of passes could be carried out, each subtending the same angle to the surface, or subtending a different angle.
- In addition, a circular motion may also be imparted to the jet spray to improve coating removal. The circular motion can be imparted manually, by the action of a jet spray or by mechanical means For example, the action of the spray leaving the nozzle is used to induce motion in the nozzle, by giving the direction of the spray a radial component relative to the longitudinal axis of the nozzle. Alternatively, a small motor is used to morse the nozzle in a circular motion.
- For ease of operation, the
outlet valve 4 is conveniently situated adjacent to the nozzle but can be remote from it. The nozzle can have different forms to deliver particular jet sprays where required. The width of the outlet of the nozzle should be wide enough to prevent clogging, and narrow enough to allow concentration of the force delivered by the spray, onto a small enough area to be effective. For hand-held nozzles the outlet is typically 1 ¼ to 2 ½ cm in diameter. - The inlet air pressure admitted through
value 3 is typically 6x105 to 10x105 Nm−2. Although compressed air supplied by an on-site compressor will usually be most convenient, air or other gases supplied in pressurised cylinders can also be used, for example, where no power source for a compressor is available. The pressure built up inside the pot 1, prior to spraying is typically less than 20x105 Nm−2 and is normally less than 14x105 Nm−2. The blast pressure can be up to 12x105 Nm−2, but can be as low as 4x105 Nm−2. The pressure used will depend very much on the coating being removed, and on the nature of the surface which is coated. - During use, the initial pressure built up in the pot will drop back from its initial value, perhaps down to approximately 3x105 Nm−2.
- The composition of the jet spray delivered can be varied by alteration of the rate of water addition to the pot, but can also be varied by changing the operating pressures, The composition can thus be adjusted to suit the nature of the coating material being removed, and the surface which it coats. A typical composition will be between approximately 1:1 and 3:1 of particulate solid to liquid.
- As alternatives or in addition to olivine (also known as forsterite)—which depending on its composition has a Moh hardness of between 6.5 to 7—other minerals such as andalusite, spodumene, diaspore, conuolite, spessartine and arndesine may also be used. In addition, man-made materials in the form of a particulate solid of the requisite hardness range may also be used.
- The particulate solid can have a particle size of 60 to 100 mesh. It has been found that if the particles are too large, then they can cause damage to the surface itself, rather than simply removing the coating, A mixture of particles having differing mesh sizes could also be used.
- The water used can, in addition to coming from the domestic supply, also be fresh water or sea water. If sea water is used then the surface should preferably be rinsed off with domestic supply water, prior to its being re-coated. As alternatives to or in addition to water, certain organic or inorganic solvents may also be employed. Examples of solvents which can be employed are alkyl alcohols, such as ethanol propanol, iso-propanol, ethylene glycol or propylene glycol. Other solvents which may be contemplated include acetone, butanone and sulpholane. Especially suitable are those which may have a solublising or swelling effect on the surface coating being removed, thus rendering it more easily removable. When necessary, suitable measures will need to be taken to protect the operator and the environment from these solvents.
- In addition to liquids as described above, other fluids may be employed, either partially or fully in their place. Suitable examples of fluids which may be used include air or nitrogen.
- The water supplied from a domestic or external source is normally provided at a temperature of below 20° C. Where necessary however it may be heated up to about 50° C. Heating the water to a temperature of between 25 to 40° C. has been found to reduce water consumption. The heating may be accomplished by means of an independent heating element mounted within the blasting pot or alternatively to the water inlet supply. As an alternative, where a petrol or diesel powered generator is used to operate for example a compressor to produce compressed air, then the exhaust pipe can pass through the water, on its way to the gases being vented, and the heat from the exhaust can be utilised to raise the temperature of the water.
- The apparatus used can conveniently be bolted to a trailer or other suitable transporting vehicle to enable it to be taken more easily to where it is required This will also allow for example, a supply of water for spraying to be taken, where it would otherwise be difficult to obtain.
- It will of course be understood that the invention is not limited to the specific details described herein, which are given by way of example only, and that various modifications and alterations are possible with the scope of the appended claims.
Claims (11)
1. A method of removing a coating from a surface, the method comprising:
(i) selecting a particulate solid suitable for removing the coating from the surface, the particulate solid having a particle size from 150 to 250 μm;
(ii) selecting a fluid as a carrier for the particulate solid;
(iii) heating the fluid to a temperature of from 25 to 50° C.;
(iv) distributing the particulate solid in the fluid to form a spray mixture;
(v) generating a pressurised jet to the spray mixture;
(vi) impacting onto a coating the pressurised jet of spray mixture to remove the coating.
2. A method according to claim 1 , wherein the particulate solid has a particle size of from 170 to 190 μm.
3. A method according to either claim 1 , wherein the hardness of the particulate solid is less than 8.0 on the Moh scale.
4. A method according to claim 3 , wherein the hardness of the particulate solid is from 6.0 to 7.0 on the Moh scale.
5. A method according to claim 1 , wherein the particulate solid is olivine.
6. A method according to claim 1 , wherein the fluid is a liquid.
7. A method according to claim 6 , wherein the liquid is water.
8. A method according to either of claims 6 or 7, wherein the solid to liquid volumetric ratio in the spray mixture is 2:1.
9. A method according to claim 1 , wherein the mixture is directed so as to impact the coating at an angle of 45°.
10. A method according to claim 1 , wherein the jet spray is moved, in use, in a circular motion back and forth across the coating.
11. A method according to claim 1 where the pressure is from 4x105 to 1x106 Nm−2.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/421,605 US20030203707A1 (en) | 1998-12-04 | 2003-04-23 | Method for removing surface coatings |
US11/699,197 US20070207713A1 (en) | 1998-12-04 | 2007-01-29 | Method for removing surface coatings |
US12/655,249 US20100167631A1 (en) | 1998-12-04 | 2009-12-28 | Method for removing surface coatings |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9826683.6 | 1998-12-04 | ||
GBGB9826683.6A GB9826683D0 (en) | 1998-12-04 | 1998-12-04 | Compositions for removing surface coatings |
GB9827214.9 | 1998-12-11 | ||
GBGB9827214.9A GB9827214D0 (en) | 1998-12-11 | 1998-12-11 | Methods and compositions for removing surface coatings |
US09/857,513 US6609955B1 (en) | 1998-12-04 | 1999-12-06 | Method for removing surface coatings |
US10/421,605 US20030203707A1 (en) | 1998-12-04 | 2003-04-23 | Method for removing surface coatings |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1999/004108 Continuation WO2000034011A1 (en) | 1998-12-04 | 1999-12-06 | Method for removing surface coatings |
US09/857,513 Continuation US6609955B1 (en) | 1998-12-04 | 1999-12-06 | Method for removing surface coatings |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/699,197 Continuation US20070207713A1 (en) | 1998-12-04 | 2007-01-29 | Method for removing surface coatings |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030203707A1 true US20030203707A1 (en) | 2003-10-30 |
Family
ID=26314787
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/857,513 Expired - Fee Related US6609955B1 (en) | 1998-12-04 | 1999-12-06 | Method for removing surface coatings |
US10/421,605 Abandoned US20030203707A1 (en) | 1998-12-04 | 2003-04-23 | Method for removing surface coatings |
US11/699,197 Abandoned US20070207713A1 (en) | 1998-12-04 | 2007-01-29 | Method for removing surface coatings |
US12/655,249 Abandoned US20100167631A1 (en) | 1998-12-04 | 2009-12-28 | Method for removing surface coatings |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/857,513 Expired - Fee Related US6609955B1 (en) | 1998-12-04 | 1999-12-06 | Method for removing surface coatings |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/699,197 Abandoned US20070207713A1 (en) | 1998-12-04 | 2007-01-29 | Method for removing surface coatings |
US12/655,249 Abandoned US20100167631A1 (en) | 1998-12-04 | 2009-12-28 | Method for removing surface coatings |
Country Status (14)
Country | Link |
---|---|
US (4) | US6609955B1 (en) |
EP (2) | EP1647363A1 (en) |
AT (1) | ATE303881T1 (en) |
AU (1) | AU766969B2 (en) |
BR (1) | BR9916463A (en) |
CA (1) | CA2353609A1 (en) |
DE (1) | DE69927181T2 (en) |
DK (1) | DK1150801T3 (en) |
ES (1) | ES2249925T3 (en) |
GB (1) | GB2344348B (en) |
HK (1) | HK1042668B (en) |
NO (2) | NO20012750L (en) |
NZ (2) | NZ512506A (en) |
WO (1) | WO2000034011A1 (en) |
Cited By (5)
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US20070054058A1 (en) * | 2005-09-06 | 2007-03-08 | Starcevich Lee E | Surface treatment system |
US20110053464A1 (en) * | 2009-09-02 | 2011-03-03 | All Coatings Elimination System Corporation | System and method for removing a coating from a substrate |
CN111390770A (en) * | 2020-04-08 | 2020-07-10 | 四川富乐德科技发展有限公司 | Cleaning method for O L ED evaporation equipment tantalum crucible surface material residues |
CN111791150A (en) * | 2019-04-08 | 2020-10-20 | 上海盛源环保工程有限公司 | Ship surface four-layer paint removing process |
CN111823143A (en) * | 2019-04-15 | 2020-10-27 | 上海盛源环保工程有限公司 | Ship surface six-layer paint removing process |
Families Citing this family (7)
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ATE303881T1 (en) * | 1998-12-04 | 2005-09-15 | Farrow System Ltd | METHOD TO REMOVE COATINGS FROM SURFACES |
US6905396B1 (en) * | 2003-11-20 | 2005-06-14 | Huffman Corporation | Method of removing a coating from a substrate |
JP2010192673A (en) * | 2009-02-18 | 2010-09-02 | Tokyo Electron Ltd | Substrate cleaning method, substrate cleaning device, control program, and computer-readable storage medium |
CN101875045B (en) * | 2009-11-03 | 2011-11-23 | 大连海事大学 | High-pressure water jet flow system for removing rust of ships and working method thereof |
WO2016144669A1 (en) | 2015-03-06 | 2016-09-15 | FP Group, LLC | Mobile wet abrasive blasting system utilizing automated valves to simplify setup and operational functions |
RU2690454C1 (en) * | 2018-12-05 | 2019-06-03 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тульский государственный университет" (ТулГУ) | Method for hydroabrasive cleaning of surfaces from contaminants |
US11590631B2 (en) | 2019-08-14 | 2023-02-28 | Clean Blast Systems, LLC | Wet abrasive blast machine with remote control rinse cycle |
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1999
- 1999-12-06 AT AT99959525T patent/ATE303881T1/en not_active IP Right Cessation
- 1999-12-06 EP EP05019054A patent/EP1647363A1/en not_active Withdrawn
- 1999-12-06 EP EP99959525A patent/EP1150801B1/en not_active Expired - Lifetime
- 1999-12-06 NZ NZ512506A patent/NZ512506A/en not_active IP Right Cessation
- 1999-12-06 NZ NZ530009A patent/NZ530009A/en not_active IP Right Cessation
- 1999-12-06 AU AU16669/00A patent/AU766969B2/en not_active Ceased
- 1999-12-06 DK DK99959525T patent/DK1150801T3/en active
- 1999-12-06 BR BR9916463-9A patent/BR9916463A/en not_active IP Right Cessation
- 1999-12-06 DE DE69927181T patent/DE69927181T2/en not_active Expired - Fee Related
- 1999-12-06 ES ES99959525T patent/ES2249925T3/en not_active Expired - Lifetime
- 1999-12-06 GB GB9928726A patent/GB2344348B/en not_active Expired - Fee Related
- 1999-12-06 US US09/857,513 patent/US6609955B1/en not_active Expired - Fee Related
- 1999-12-06 CA CA002353609A patent/CA2353609A1/en not_active Abandoned
- 1999-12-06 WO PCT/GB1999/004108 patent/WO2000034011A1/en active IP Right Grant
-
2001
- 2001-06-05 NO NO20012750A patent/NO20012750L/en unknown
-
2002
- 2002-04-16 HK HK02102854.9A patent/HK1042668B/en not_active IP Right Cessation
-
2003
- 2003-04-23 US US10/421,605 patent/US20030203707A1/en not_active Abandoned
- 2003-12-04 NO NO20035385A patent/NO20035385D0/en unknown
-
2007
- 2007-01-29 US US11/699,197 patent/US20070207713A1/en not_active Abandoned
-
2009
- 2009-12-28 US US12/655,249 patent/US20100167631A1/en not_active Abandoned
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070054058A1 (en) * | 2005-09-06 | 2007-03-08 | Starcevich Lee E | Surface treatment system |
US20110053464A1 (en) * | 2009-09-02 | 2011-03-03 | All Coatings Elimination System Corporation | System and method for removing a coating from a substrate |
US8353741B2 (en) * | 2009-09-02 | 2013-01-15 | All Coatings Elimination System Corporation | System and method for removing a coating from a substrate |
US20130102232A1 (en) * | 2009-09-02 | 2013-04-25 | All Coatings Elimination System Corporation | System and method for removing a coating from a substrate |
US8500520B2 (en) * | 2009-09-02 | 2013-08-06 | All Coatings Elimination System Corporation | System and method for removing a coating from a substrate |
CN111791150A (en) * | 2019-04-08 | 2020-10-20 | 上海盛源环保工程有限公司 | Ship surface four-layer paint removing process |
CN111823143A (en) * | 2019-04-15 | 2020-10-27 | 上海盛源环保工程有限公司 | Ship surface six-layer paint removing process |
CN111390770A (en) * | 2020-04-08 | 2020-07-10 | 四川富乐德科技发展有限公司 | Cleaning method for O L ED evaporation equipment tantalum crucible surface material residues |
Also Published As
Publication number | Publication date |
---|---|
AU766969B2 (en) | 2003-10-30 |
GB9928726D0 (en) | 2000-02-02 |
US6609955B1 (en) | 2003-08-26 |
ATE303881T1 (en) | 2005-09-15 |
US20100167631A1 (en) | 2010-07-01 |
EP1150801A1 (en) | 2001-11-07 |
DE69927181D1 (en) | 2005-10-13 |
US20070207713A1 (en) | 2007-09-06 |
GB2344348B (en) | 2003-02-26 |
AU1666900A (en) | 2000-06-26 |
HK1042668B (en) | 2006-04-13 |
NZ512506A (en) | 2004-01-30 |
CA2353609A1 (en) | 2000-06-15 |
DK1150801T3 (en) | 2006-01-16 |
NO20035385D0 (en) | 2003-12-04 |
NZ530009A (en) | 2005-08-26 |
WO2000034011A1 (en) | 2000-06-15 |
NO20012750L (en) | 2001-07-11 |
NO20012750D0 (en) | 2001-06-05 |
ES2249925T3 (en) | 2006-04-01 |
EP1150801B1 (en) | 2005-09-07 |
BR9916463A (en) | 2002-02-05 |
EP1647363A1 (en) | 2006-04-19 |
DE69927181T2 (en) | 2006-07-20 |
GB2344348A (en) | 2000-06-07 |
HK1042668A1 (en) | 2002-08-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |
|
AS | Assignment |
Owner name: FARROW HOLDINGS GROUP, INC., PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FARROW SYSTEMS, LTD.;REEL/FRAME:020478/0097 Effective date: 20071211 |
|
AS | Assignment |
Owner name: FARROW HOLDING GROUP INC. (FHG), PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FARROW SYSTEMS LTD.;REEL/FRAME:020532/0588 Effective date: 20071210 |