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Inventor:
Tsang; Joseph W
Address:
Corvallis, OR
No. of patents:
26
Patents:












Patent Number Title Of Patent Date Issued
7829608 Polymeric additives to improve print quality and permanence attributes in ink-jet inks November 9, 2010
Two-part fixatives are provided in conjunction with overcoating at least one ink-jet ink printed on a print medium and comprise (1) at least one first reactive component comprising a reactive monomer or oligomer, the reactive species selected from the group consisting of iso-cyanates and
7446134 Polymeric additives to improve print quality and permanence attributes in ink-jet inks November 4, 2008
Two-part fixatives are provided in conjunction with overcoating at least one ink-jet ink printed on a print medium and comprise (1) at least one first reactive component comprising a reactive monomer or oligomer, the reactive species selected from the group consisting of iso-cyanates and
7435291 Amine- and phthalocyanine dye-containing ink-jet inks with improved ozone fastness October 14, 2008
In accordance with embodiments of the present invention, an ink-jet ink can comprise a metallized phthalocyanine dye and a liquid vehicle carrying the dye. The liquid vehicle can include an amine additive present in the ink-jet ink at an effective concentration to cause improvement o
7291418 Methods and systems for elevating a temperature within a fuel cell November 6, 2007
A method for elevating a temperature within a fuel cell having a cathode, an electrolyte and an anode, includes, prior to the electrolyte reaching a minimum temperature at which oxygen ions cross the electrolyte, conducting an exothermic reaction at the cathode or the anode to elevate
7241527 Method and apparatus for facilitating a chemical reaction July 10, 2007
A method of facilitating a chemical reaction includes raising a temperature of a protective layer covering a catalyst in the presence of a chemical solution.
7128997 Method and system for dispensing pelletized fuel for use with a fuel cell October 31, 2006
Representative embodiments provide for a fuel activation device including a fuel storage chamber configured to store a plurality of fuel pellets arranged as a stack. A fuel dispensing device is configured to transport a fuel pellet to a fuel activation chamber. A spring is configured to
6982128 Co-catalyst proton exchange membrane fuel cell utilizing borohydride fuels January 3, 2006
Two co-catalysts selected from the transitional metals can be employed in proton exchange membrane fuel cells to catalyze a borohydride anolyte, such that diatomic hydrogen produced on the surface of a particle of a first catalyst is diffused to an adjacent surface of a particle of a
6924054 Fuel supply for a fuel cell August 2, 2005
The present invention concerns a fuel supply for a fuel cell. The fuel supply includes a fuel storage area configured to hold a fuel solution, a fuel solution outlet configured to pass the fuel solution from the fuel storage area, a waste storage area, a waste inlet configured to pass wa
6818334 Accelerated hydrogen generation through reactive mixing of two or more fluids November 16, 2004
The rate of hydrogen generation in proton-exchange-membrane (PEM) fuel cells is greatly accelerated by mixing a first aqueous alkali borohydride solution with a second aqueous solution in the presence of one or more transition metal catalysts: ##STR1##wherein the first solution compr
6786957 Aqueous ink-jet inks for printing on commercial offset coated media September 7, 2004
An aqueous ink-jet ink composition for printing on offset media is disclosed comprising an ink colorant, an effective amount of at least one surfactant, and an effective amount of at least one aprotic polar solvent wherein the solvent is comprised of molecules having a molecular weight
6602335 Pigment solubilization via treatment with strong base and substitution August 5, 2003
A method for dispersing a pigment in an aqueous solution is provided. The method comprises: (a) providing the pigment, which is distinguished in having an azo group and either a .beta.-diketo structure or a hydroxyl group, each conjugatively associated with the azo group; (b) treating a
6468340 Laked dye solubilization with complexing agent October 22, 2002
An inkjet ink composition having good stability which is an aqueous dispersion and/or solution of large particles of water soluble pigments derived from laked dyes, the water solubilizing groups on the surface of the laked dyes being exposed by removing surface counter-cations with c
6450632 Underprinting fluid compositions to improve inkjet printer image color and stability September 17, 2002
Cationic underprinting fluids, which together with pigment-based ink compositions achieve enhanced durability, chroma, optical density and print quality in inkjet printed images.
6323257 Ink-jet ink compositions containing reactive macromolecular chromophores for digital and textile November 27, 2001
The present invention relates to ink-jet ink compositions that comprise modified pigment particles (macromolecular chromophores) having functional groups covalently attached for water solubility and reactive moieties covalently attached to the pigments. MMC with such reactive moieties
6221932 Covalent attachment of polymers onto macromolecular chromophores by nucleophilic substitution re April 24, 2001
The present invention relates to ink-jet ink compositions that comprise macromolecular chromophores having functional groups covalently attached for water solubility. Moreover, the MMCs have polymer chains covalently attached to the pigments by nucleophilic substitution to provide enhanc
6177485 Polymers derived from unsaturated surfactants for use in ink-jet inks January 23, 2001
The properties of ink-jet inks containing a colorant (pigment, macromolecular chromophore, or dye) are improved by adding thereto an additive, specifically, one or more polymers derived from unsaturated surfactants. The unsaturated surfactant(s) has at least one carbon-carbon double
6150433 Ink-jet ink compositions containing modified macromolecular chromophores with covalently attache November 21, 2000
The present invention relates to ink-jet ink compositions that comprise modified pigment particles (macromolecular chromophores) having functional groups covalently attached for water solubility and polymer chains covalently attached to the pigments. These pigmented inks have enhanced
6034153 Mediation of waterfastness in ink-jet ink compositions by using partial chemically-treated macro March 7, 2000
The ink of the invention comprises (a) a vehicle comprising (1) about 1 to 50 wt % of at least one organic solvent as humectants, and (2) about 0.01 to 20 wt % of at least one water-soluble surfactant or amphiphilic polymer (cationic, anionic, or non-ionic); (b) about 1 to 20 wt % of at
5985016 Purification of macromolecular chromophores (MMCs) using membrane processes for ink-jet inks November 16, 1999
A process is provided for purifying macromolecular chromophores (MMCs), which are pigments that have been surface-treated to be water-soluble. In the surface treatment, anionic or cationic functional groups are covalently bonded onto the surface, these functional groups have undesira
5891934 Waterfast macromolecular chromophores using amphiphiles April 6, 1999
Pigments that have been at least partially treated to form surface-attached functional groups are combined with long chain amine oxides in an ink-jet ink to provide waterfastness. The ink-jet ink for ink-jet printing comprises: (a) a vehicle comprising (1) 0 to about 30 wt % of at least
5891232 Smearfastness and fast drying times in inks containing macromolecular chromophores April 6, 1999
A smearfast, waterfast, and fast drying ink is provided, employing macromolecular chromophores (MMCs) and both ionic surfactants and zwitterionic, or amphoteric, surfactants, in which the ionic surfactant is of the opposite polarity of the MMC. Macromolecular chromophores are pigment
5886065 Mediation of waterfastness in ink-jet ink compositions by using partial chemically-treated macro March 23, 1999
The ink of the invention comprises (a) a vehicle comprising (1) about 1 to 50 wt % of at least one organic solvent as humectants, and (2) about 0.01 to 20 wt % of at least one water-soluble surfactant or amphiphilic polymer (cationic, anionic, or non-ionic); (b) about 1 to 20 wt % of at
5853465 Black-to-color bleed alleviation using non-specific ionic, pH, and colloidal effects December 29, 1998
An ink-jet ink set comprises (a) a microemulsion-based black ink in which the colorant is a water-insoluble black pigment has been chemically modified to impart water solubility by addition of functional groups to form a macromolecular chromophore and (b) at least one non-black (cyan,
5830265 Counterion substitution in macromolecular chromophore (MMC) for ink-jet printing including texti November 3, 1998
The ink of the invention comprises a vehicle and a colorant. The colorant is a water-insoluble macromolecule that has been chemically modified to be water soluble by addition of functional groups to the surface of the chromophores resulting in water soluble colorant particles. The result
5788753 Polyamines complexed to anionic dyes, thereby forming water-soluble cationic dyes August 4, 1998
An ink-jet ink for ink-jet printers is provided, comprising: (a) an aqueous-based vehicle; and (b) an anionic dye complexed with a polyamine in an amount sufficient to form a pH-insensitive, water-soluble, dye:polyamine complex that acts like a cationic dye. Further, a method of conv
5749952 Preparation of microemulsion and micellar color inks from modified water-soluble color chromapho May 12, 1998
The ink of the invention comprises a vehicle and a colorant, with the vehicle comprising a microemulsion containing at least one substantially water-insoluble organic oil, at least one organic cosolvent, and water and, optionally, at least one amphiphile and at least one high molecular










 
 
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