WO2002000552A3 - Water-filter lifetime indicator - Google Patents

Water-filter lifetime indicator Download PDF

Info

Publication number
WO2002000552A3
WO2002000552A3 PCT/US2001/018870 US0118870W WO0200552A3 WO 2002000552 A3 WO2002000552 A3 WO 2002000552A3 US 0118870 W US0118870 W US 0118870W WO 0200552 A3 WO0200552 A3 WO 0200552A3
Authority
WO
WIPO (PCT)
Prior art keywords
color change
indicator
reaction
water
reagents
Prior art date
Application number
PCT/US2001/018870
Other languages
French (fr)
Other versions
WO2002000552A2 (en
Inventor
Michael L Kagan
Bradley D Mierau
Henry C Di Reid
John E Nohren Jr
Original Assignee
Innova Pure Water Inc
Profile Sol Gel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Innova Pure Water Inc, Profile Sol Gel Ltd filed Critical Innova Pure Water Inc
Priority to AU2001268342A priority Critical patent/AU2001268342A1/en
Publication of WO2002000552A2 publication Critical patent/WO2002000552A2/en
Publication of WO2002000552A3 publication Critical patent/WO2002000552A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
    • G04F1/04—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity
    • G04F1/06—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/44—Time
    • C02F2209/445—Filter life
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/04—Location of water treatment or water treatment device as part of a pitcher or jug

Abstract

An indicator, and method of indicating, the expiration of substantially the predetermined useful life of a water filter, use color change in a simple but very effective manner. The water migrates into a color change mechanism which may include a porous medium, and causes first and second reagents to react producing a color change. The reaction system between the reagents may be selected from the group consisting essentially of chelation of a metal ion by a chelating agent, reaction of an acid/base with a pH indicator, reaction of an electron donor/acceptor with a redox indicator, and an enzymatic reaction between an enzyme and a substrate. The color change mechanism displays a gradual advance of the color change over time, and may incorporate a scale to display the elapsed time. A mask containing scale indicia may be used to relate the progress of the diffusion to substantially the predetermined useful life of the filter.
PCT/US2001/018870 2000-06-23 2001-06-13 Water-filter lifetime indicator WO2002000552A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001268342A AU2001268342A1 (en) 2000-06-23 2001-06-13 Water-filter lifetime indicator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59956500A 2000-06-23 2000-06-23
US09/599,565 2000-06-23

Publications (2)

Publication Number Publication Date
WO2002000552A2 WO2002000552A2 (en) 2002-01-03
WO2002000552A3 true WO2002000552A3 (en) 2002-06-20

Family

ID=24400141

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/018870 WO2002000552A2 (en) 2000-06-23 2001-06-13 Water-filter lifetime indicator

Country Status (2)

Country Link
AU (1) AU2001268342A1 (en)
WO (1) WO2002000552A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0218318D0 (en) 2002-08-07 2002-09-11 Strix Ltd Water treatment apparatus
GB0427825D0 (en) * 2004-12-17 2005-01-19 Strix Ltd Water treatment vessels and cartridges therefor
EP2081662B1 (en) 2006-10-08 2012-08-01 Strauss Water Ltd Fluid filter monitoring device
JP2013504414A (en) 2009-09-09 2013-02-07 シュトラウス ウォーター リミテッド Liquid filtration device
DE102011075118B4 (en) * 2011-05-03 2023-12-07 BSH Hausgeräte GmbH Filter device for purifying water
CN204147673U (en) 2014-07-25 2015-02-11 萨塔有限两合公司 Holding device and filtration system
WO2016151568A1 (en) 2015-03-23 2016-09-29 Strauss Water Ltd. Water filter and assembly thereof
CN107323808A (en) * 2017-07-04 2017-11-07 厦门麓山新材料科技有限公司 A kind of timing means and application method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620677A (en) * 1961-12-18 1971-11-16 Miles Lab Indicating device
US4292916A (en) * 1979-06-18 1981-10-06 Micro-Circuits Company Timer and storage condition indicator
EP0092034A2 (en) * 1982-03-25 1983-10-26 List, Paul Heinz, Prof.Dr.rer.nat. Indicator device for a time-temperature charge
US4432656A (en) * 1979-07-13 1984-02-21 Thomas Allmendinger Process for monitoring the history of temperature versus time of deep-frozen product, indicator for applying said process and utilization of said process
WO1989000680A1 (en) * 1987-07-09 1989-01-26 Thomas Allmendinger Device for indicating the position of a fluid which spreads through a body
EP0454313A2 (en) * 1990-04-11 1991-10-30 Alcan International Limited Liquid and/or temperature activated elapsed time indicators suitable, in particular, as doneness indicators for foodstuffs
US5114570A (en) * 1989-08-14 1992-05-19 Teledyne Industries Inc. Water filter cartridge
WO1992016916A1 (en) * 1991-03-22 1992-10-01 Borden (Uk) Limited Elapsed time indicator
EP0545274A1 (en) * 1991-12-03 1993-06-09 SOCIETE COOL S.a.r.l. Preservation state indicator for frozen or refrigerated products and method for applying this indicator
US5930206A (en) * 1990-01-04 1999-07-27 Temtec, Inc. Time indicator

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620677A (en) * 1961-12-18 1971-11-16 Miles Lab Indicating device
US4292916A (en) * 1979-06-18 1981-10-06 Micro-Circuits Company Timer and storage condition indicator
US4432656A (en) * 1979-07-13 1984-02-21 Thomas Allmendinger Process for monitoring the history of temperature versus time of deep-frozen product, indicator for applying said process and utilization of said process
EP0092034A2 (en) * 1982-03-25 1983-10-26 List, Paul Heinz, Prof.Dr.rer.nat. Indicator device for a time-temperature charge
WO1989000680A1 (en) * 1987-07-09 1989-01-26 Thomas Allmendinger Device for indicating the position of a fluid which spreads through a body
US5114570A (en) * 1989-08-14 1992-05-19 Teledyne Industries Inc. Water filter cartridge
US5930206A (en) * 1990-01-04 1999-07-27 Temtec, Inc. Time indicator
EP0454313A2 (en) * 1990-04-11 1991-10-30 Alcan International Limited Liquid and/or temperature activated elapsed time indicators suitable, in particular, as doneness indicators for foodstuffs
WO1992016916A1 (en) * 1991-03-22 1992-10-01 Borden (Uk) Limited Elapsed time indicator
EP0545274A1 (en) * 1991-12-03 1993-06-09 SOCIETE COOL S.a.r.l. Preservation state indicator for frozen or refrigerated products and method for applying this indicator

Also Published As

Publication number Publication date
AU2001268342A1 (en) 2002-01-08
WO2002000552A2 (en) 2002-01-03

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