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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US401999428 Ago 197526 Abr 1977Georgia-Pacific CorporationProcess for the preparation of aqueous magnetic material suspensions
US402544829 Dic 197524 May 1977Union Carbide CorporationSuperparamagnetic wax compositions useful in magnetic levitation separations
US40644532 Jul 197620 Dic 1977Xerox CorporationMagnetic field detector
US407839229 Dic 197614 Mar 1978Borg-Warner CorporationDirect contact heat transfer system using magnetic fluids
US41000882 Jul 197611 Jul 1978Xerox CorporationImaging composition
US41070632 Mar 197715 Ago 1978International Business Machines CorporationWater based selectable charge magnetic inks
US41087672 Sep 197522 Ago 1978Georgia-Pacific CorporationSeparation of an aqueous or water-miscible liquid from a fluid mixture
US420829412 Feb 197917 Jun 1980The United States of America, as represented by the Secretary of the InteriorDilution stable water based magnetic fluids
US429261524 Jul 197929 Sep 1981Switching element
US431582713 Feb 198116 Feb 1982Ferrofluidics CorporationLow-vapor-pressure ferrofluids and method of making same
US44302397 Feb 19837 Feb 1984Ferrofluidics CorporationFerrofluid composition and method of making and using same
US455408812 May 198319 Nov 1985Advanced Magnetics Inc.Magnetic particles for use in separations
US457672513 Jun 198418 Mar 1986Toyota Jidosha Kabushiki KaishaMagnetic fluid incorporating fine magnetic powder and method for making the same
US459918429 Ene 19858 Jul 1986National Research InstituteProcess for producing ferromagnetic liquid
US460422221 May 19855 Ago 1986Ferrofluidics CorporationStable ferrofluid composition and method of making and using same
US460422920 Mar 19855 Ago 1986Ferrofluidics CorporationElectrically conductive ferrofluid compositions and method of preparing and using same
US460818630 Jul 198526 Ago 1986TDK CorporationMagnetic fluid
US462479712 Sep 198525 Nov 1986TDK CorporationMagnetic fluid and process for preparing the same
US462637012 Sep 19852 Dic 1986TDK CorporationMagnetic fluid
US466484130 Oct 198412 May 1987Ricoh Co., Ltd.Fine particle substance-containing non-aqueous dispersions
US468759619 Jun 198618 Ago 1987Ferrofluidics CorporationLow viscosity, electrically conductive ferrofluid composition and method of making and using same
US470127631 Oct 198620 Oct 1987Hitachi Metals, LTD.Super paramagnetic fluids and methods of making super paramagnetic fluids
US473270626 May 198722 Mar 1988Ferrofluidics CorporationMethod of preparing low viscosity, electrically conductive ferrofluid composition
US474185030 Jul 19873 May 1988Hitachi Metals, Ltd.
Consolidated Chemical Consulting Co.
Super paramagnetic fluids and methods of making super paramagnetic fluids
US478315026 Oct 19878 Nov 1988Commissariat a l'Energie AtomiqueThermally electrically or magnetically controllable lyotropic liquid crystal optical devices
US48491202 May 198818 Jul 1989Magnetically controllable couplings containing ferrafluids
US485507927 Ago 19878 Ago 1989Hitachi Metals, Ltd.
Consolidated Chemical & Consulting Co.
Super paramagnetic fluids and methods of making super paramagnetic fluids
US493888621 Sep 19883 Jul 1990SKF Nova ABSuperparamagnetic liquids and methods of making superparamagnetic liquids
US494662326 Oct 19877 Ago 1990Commissariat a l'Energie AtomiqueProcess for the production of a ferromagnetic composition, ferromagnetic liquid crystal obtained by this process and apparatus using said liquid crystal
US495764427 Jun 198918 Sep 1990Magnetically controllable couplings containing ferrofluids
US504930724 May 199017 Sep 1991Commissariat a l'Energie AtomiqueProcess for the production of a ferromagnetic composition, ferromagnetic liquid crystal obtained by this process and apparatus using said liquid crystal
US506921619 Sep 19893 Dic 1991Advanced Magnetics Inc.Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract
US521955431 Mar 199215 Jun 1993Advanced Magnetics, Inc.Hydrated biodegradable superparamagnetic metal oxides
US532090620 Dic 199114 Jun 1994Vestar, Inc.Delivery vehicles with amphiphile-associated active ingredient
US557823813 Abr 199426 Nov 1996Lord CorporationMagnetorheological materials utilizing surface-modified particles
US559947418 Abr 19944 Feb 1997Lord CorporationTemperature independent magnetorheological materials
US564575220 Dic 19958 Jul 1997Lord CorporationThixotropic magnetorheological materials
US565619615 Dic 199412 Ago 1997Ferrotec CorporationFerrofluid having improved oxidation resistance
US56700887 Jun 199523 Sep 1997Ausimont S.p.A.Preparation of mixed ultrafine particles from PFPE micro-emulsion
US585141612 Feb 199722 Dic 1998Ferrofluidics CorporationStable polysiloxane ferrofluid compositions and method of making same
US58795803 Dic 19969 Mar 1999Ferrotec CorporationFerrofluid having improved oxidation resistance
US606878510 Feb 199830 May 2000Ferrofluidics CorporationMethod for manufacturing oil-based ferrofluid
US649184211 Ago 200010 Dic 2002Studiengesellschaft Kohle mbH
Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
Anticorrosive magnetic nanocolloids protected by precious metals
US720813420 Dic 200424 Abr 2007Massachusetts Institute of TechnologyBioprocesses enhanced by magnetic nanoparticles
US734175710 Feb 200511 Mar 2008NanoProducts CorporationPolymer nanotechnology
US738767320 May 200317 Jun 2008PPG Industries Ohio, Inc.Color pigment nanotechnology
US770897410 May 20054 May 2010PPG Industries Ohio, Inc.Tungsten comprising nanomaterials and related nanotechnology
US805833712 Jun 200715 Nov 2011PPG Industries Ohio, Inc.Conductive nanocomposite films