Patents Examined by Anthony Green
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Patent number: 6398858Abstract: The present invention relates to a process for preparing surface-modified colored pigments. The process includes the steps of: preparing a reaction batch comprising a treating agent and a diazotizing agent; adding a colored pigment to the batch; and mixing the colored pigment and the batch under high shear conditions to form a reaction product comprising a surface-modified colored pigment. The treating agent has an organic group which comprises at least one diazotizable group. In a preferred embodiment the diazotizable group comprises a) at least one aromatic group or at least one C1-C20 alkyl group, and b) at least one ionic group, ionizable group, nonionic group, or a mixture thereof. The surface-modified colored pigments prepared by the process of the present invention have been found useful in aqueous or solvent based compositions and particularly in ink jet ink compositions.Type: GrantFiled: March 3, 2000Date of Patent: June 4, 2002Assignee: Cabot CorporationInventors: Yuan Yu, Ronald J. Gambale, Robert M. Amici
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Patent number: 6398861Abstract: There is provided a process for preparing a low- or non-dusting substantially non-volatile (preferably highly light reflective) metal flake pigment composition, which comprises ball milling atomized metal powder in a milling fluid substantially comprised of water, in the presence of one or more corrosion inhibitors and a substance which acts as a lubricant for the milling process. Optionally, the paste may be formed into granules for easy storage. Preferred metal pigments are aluminum or gold bronze and in one embodiment the metal pigment is aluminum, the lubricant is oleic acid and the corrosion inhibitor is a phosphate ester having a polyethylene oxide side chain. Agent(s) having both lubricating and corrosion inhibiting properties are preferred as additives.Type: GrantFiled: April 13, 1999Date of Patent: June 4, 2002Assignee: Silberline LimitedInventor: Jonathan Joseph Whistler Knox
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Patent number: 6395081Abstract: The present invention provides methods of preparing a titanium dioxide pigment having improved gloss properties which involves heating an aqueous slurry of base titanium dioxide pigment to a temperature below about 75° C., coating the base titanium dioxide pigment with a silica compound at a temperature below about 75° C. to form a silica coated titanium dioxide pigment; and coating the silica coated titanium dioxide pigment with an alumina compound at a temperature below about 75° C. to form the titanium dioxide pigment having improved gloss.Type: GrantFiled: November 3, 2000Date of Patent: May 28, 2002Assignee: Millennium Inorganic Chemical, Inc.Inventors: Michael Hiew, Yarw-Nan Wang, Les Hamor, Brian Tear, Robert McIntyre
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Patent number: 6391104Abstract: This invention relates to perylene pigment compositions containing a reactive co-precipitated blend of (1) about 75 to about 99.9 mol %, relative to the pigment composition, of a compound having the formula (I) wherein R is hydrogen, C1-C6 alkyl, C5-C8 cycloalkyl, C7-C6 aralkyl, or C6-C10 aryl, A is C1-C6 alkyl, C1-C6 alkoxy, a sulfonyl group, amino, ammonium, hydroxy, nitro, or halogen, and m is zero or a number from 1 to 8; and (2) about 0.1 to about 25 mol %, relative to the pigment composition, of a perylene dicarboxamidine imide having the formula (II) wherein W is optionally substituted or modified C2-C3 alkylene, and R, A, and m are defined as above.Type: GrantFiled: December 1, 2000Date of Patent: May 21, 2002Assignee: Bayer CorporationInventor: Gregory R. Schulz
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Patent number: 6391224Abstract: Polyvinyl alcohol and related compounds are provided that inhibit the freezing of water and water solutions. These synthetic compounds preferentially bind and inhibit ice nucleating surfaces in a manner similar to natural antifreeze proteins. The resulting inhibition allows water and water solutions to supercool without ice formation to temperatures below the thermodynamic freezing point. The freezing inhibition occurs at concentrations as small as one part per million, although concentrations up to one part per hundred are preferred. These polyvinyl alcohol additives are very useful for enhancing the performance of antifreeze formulations, biological cryopreservation solutions, and for preventing frost damage to plants and other industrial products and processes.Type: GrantFiled: September 21, 1999Date of Patent: May 21, 2002Assignee: 21Inventor: Brian Wowk
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Patent number: 6391843Abstract: A composition comprising: an organic chemical having a chemical group having a dipole moment of at least about 1.5 Debyes and a chemical linker selected from the group consisting of carboxylic acids having 4 to 6 carbon atoms, an ethoxylated polyhydric alcohol, a polyvinyl pyrrolidone and a polyethylene glycol having a molecular weight of about 600 to about 10,000, wherein the molar ratio of organic chemical to chemical linker is about 4:1 to 1:4.Type: GrantFiled: September 1, 2000Date of Patent: May 21, 2002Assignee: Colgate-Palmolive Co.Inventors: Michele Davister, Guy Broze, Patrick Durbut, Hoai-Chau Cao, Thomas Connors, John Labows, Anne-Marie Misselyn
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Patent number: 6387292Abstract: An anti-soil finishing agent is produced by copolymerizing a fluoroalkyl group-containing monomer with a hydrophilic group-containing monomer in polypropylene glycol having an average molecular weight of not more than about 1,000 or a mixture thereof with a water-soluble organic solvent having a boiling point of not less than 150° C. or a flash point of more than 61° C. The anti-soil finishing agent has not only a high flash point, but also distinguished frozen stability and high temperature stability (storage stability at a temperature of about 40˜50° C. higher than room temperature).Type: GrantFiled: July 28, 2000Date of Patent: May 14, 2002Assignee: Nippon Mektron, LimitedInventor: Chiaki Saito
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Patent number: 6387176Abstract: A new category of multi-purpose polymers is presented, the polymers being capable to serve as a cement dispersing agent and which at the same time are set-accelerating and do have shrinkage reducing- and anticorrosive properties to steel. The polymers are ester and amide group-modified acrylic polymers, obtainable by a polymer analogous esterification of a polyacrylic acid with 1) a monofunctional polyalkyleneglycol-monoalkylether, 2) a tertiary alkanolamine and optionally 3) by amidation with a amino-polyalkylenglycol alkylether. The multi-purpose polymers serve for cement dispersing admixture for concrete with set accelerating, shrinkage compensating and anticorrosive properties to steel.Type: GrantFiled: April 17, 2000Date of Patent: May 14, 2002Assignee: Sika AG, vorm. Kaspar Winkler & Co.Inventors: Jürg Widmer, Ueli Sulser, Theodor A. Bürge, Ulf Velten, Anna Krapf-Huber
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Patent number: 6387291Abstract: An aqueous leather coating composition and a method for coating leather with the aqueous coating composition are provided. The aqueous coating composition contains an aqueous emulsion polymer which includes from 0.4% to 10% by weight of a copolymerized acetoacetate or acetoacetamide monomer and has a glass transition temperature from −20° C. to 10° C. In an alternative embodiment the aqueous coating composition contains an aqueous emulsion polymer which includes from 0.1% to 6% by weight of a copolymerized acetoacetate or acetoacetamide monomer and from 2% to 15% by weight of copolymerized carboxylic acid monomer and has a glass transition temperature from −40° C. to 0° C., the polymer having been contacted with a transition metal oxide, hydroxide, or carbonate at a pH less than 9 in an amount greater than 0.20 equivalent of transition metal per equivalent of copolymerized carboxylic acid monomer.Type: GrantFiled: May 31, 2001Date of Patent: May 14, 2002Assignee: Rohm and Haas CompanyInventors: Patricia Marie Lesko, Frederick James Schindler
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Patent number: 6387170Abstract: An orange laked monoazo pigment has the following formula (I): wherein M is an alkaline metal selected from the group consisting of calcium, barium, strontium, magnesium and manganese.Type: GrantFiled: August 28, 2000Date of Patent: May 14, 2002Assignee: Dominion Colour CorporationInventors: Alan Gray, Henry Lui, Dorothy-Grace Manarang-Pena
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Patent number: 6387498Abstract: A flake-based pigment is provided having improved specular reflectance characteristics in the visible wavelength range. The flake-based pigment has a plurality of core flake sections each formed of a central reflector layer and dielectric support layers on opposing sides of the reflector layer. The resulting core flake section is a very thin three-layered structure that exhibits a uniaxial compressive strength much greater than a corresponding uniaxial tensile strength. This structure provides the benefits of rigidity and brittle fracture during manufacturing and application processes, which ultimately provides favorable planar and specular reflectance characteristics for the pigment in the visible wavelength range. A variety of outer coating layers can be formed around the core flake sections, such as various dielectric and absorber layers having thicknesses dependent upon the desired optical characteristics of the pigment.Type: GrantFiled: April 7, 2000Date of Patent: May 14, 2002Assignee: Flex Products, Inc.Inventors: Kent E. Coulter, Thomas Mayer, Roger W. Phillips, John S. Matteucci
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Patent number: 6383638Abstract: A flake-based pigment is provided having improved specular reflectance characteristics in the visible wavelength range. The flake-based pigment has a plurality of core flake sections each formed of a central reflector layer and dielectric support layers on opposing sides of the reflector layer. The resulting core flake section is a very thin three-layered structure that exhibits a uniaxial compressive strength much greater than a corresponding uniaxial tensile strength. This structure provides the benefits of rigidity and brittle fracture during manufacturing and application processes, which ultimately provides favorable planar and specular reflectance characteristics for the pigment in the visible wavelength range. A variety of outer coating layers can be formed around the core flake sections, such as various dielectric and absorber layers having thicknesses dependent upon the desired optical characteristics of the pigment.Type: GrantFiled: October 13, 2000Date of Patent: May 7, 2002Assignee: Flex Products, Inc.Inventors: Kent E. Coulter, Thomas Mayer, Roger W. Phillips, John S. Matteucci
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Patent number: 6383273Abstract: The invention relates to a process for producing compositions containing a biocidal compound or adsorbent and/or catalyst compound and the compositions thereof. The invention also relates to a method for reducing or eliminating the amount of a bioactive agent or contaminant from an environment by contacting the environment with the composition of for a sufficient time to reduce or eliminate the amount of the bioactive agent or contaminant in the environment.Type: GrantFiled: August 12, 1999Date of Patent: May 7, 2002Assignee: Apyron Technologies, IncorporatedInventors: Bryan E. Kepner, Eric A. Mintz
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Patent number: 6383409Abstract: Ammonium biacetate is a useful material for heat storage applications such as culinary implements, medicinal uses, and solar energy storage.Type: GrantFiled: March 16, 2001Date of Patent: May 7, 2002Assignee: E. I. du Pont de Nemours and CompanyInventor: Albert Gordon Anderson
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Patent number: 6383284Abstract: A dry masonry render mixture comprising, in concentrations which can be varied to achieve different finishes, Portland cement, river sand, graded stones, plasterers lime, the ingredients being mixed in the presence of lightweight filaments and silica-based catalyst. The dry render masonry mixture is mixed with a liquid solution of water and a latex polymer of various concentrations to form a slurry. The invention includes several methods of application of varying concentrations of the slurry to obtain different textured finishes.Type: GrantFiled: May 4, 2000Date of Patent: May 7, 2002Inventor: Judith Clare De Loub
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Patent number: 6383271Abstract: An anti-corrosive coating composition suitable for providing corrosion protection for a sheet metal substrate includes from 20 to 97 wt. % of a filler dispersed in a polymeric base or matrix material. The filler includes at least one filler material having a hollow cellular structure, of which the hollow cells are loaded with organic and/or inorganic inhibitors and/or antioxidants. The hollow cellular structure material may be diatomaceous earth, zeolite, or carbon. The inhibitors and/or antioxidants may be selected from carbonic acids, amines, ketones, aldehydes, heterocyclic compounds, phosphates, benzoates, silicates, vanadates, tungstates, zirconates, borates, molybdates, benzaldehyde, vitamin C, vitamin E, or the like. A long term durable corrosion protection is achieved because the inhibitors and/or antioxidants are released from the hollow cells of the filler material in a dosed time-release manner over the operating lifetime of the anti-corrosive coating.Type: GrantFiled: January 27, 2000Date of Patent: May 7, 2002Assignee: DaimlerChrysler AGInventor: Christina Schmidt
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Patent number: 6379582Abstract: The invention is a composition for thermal energy storage in heating or cooling items. The composition includes a crosslinked alkali metal polyacrylamide or polyacrylate/polyacrylamide copolymer. The alkali metal may be potassium or sodium, preferably potassium. The copolymer has a particle size of at least 1500 microns, preferably 2000-4000 microns. The composition includes water with its pH adjusted to 6.0 to 7.0. The composition also includes propylene glycol. An antimicrobial agent is included to prevent degradation due to microbial growth. A coloring agent may also be added. The composition has the appearance of crushed ice.Type: GrantFiled: March 28, 2000Date of Patent: April 30, 2002Assignee: Magic Ice, Inc.Inventor: Jimmy W. Putman
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Patent number: 6379451Abstract: There are disclosed a pigment composition comprising a dry-milled pigment, a water-soluble resin, and a nonionic surfactant composed of a compound having an acetylenic linkage; and a method for producing a pigment composition, comprising dry-milling a pigment containing coarse particles in the presence of a water-soluble resin and a nonionic surfactant composed of a compound having an acetylenic linkage. The production method is also possible in the form of comprising (a) dry-milling a pigment containing coarse particles in the presence of a nonionic surfactant composed of a compound having an acetylenic linkage thereby obtaining an intermediate milled product, and (b) further dry-milling a mixture of the intermediate milled product and a water-soluble resin.Type: GrantFiled: April 4, 2000Date of Patent: April 30, 2002Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Kenji Kitamura, Ataru Chiba
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Patent number: 6379450Abstract: A process for the preparation of &bgr; phase copper phthalocyanine pigment which includes dry grinding crude copper phthalocyanine in the absence of a grinding aid to obtain a crude mill; and conditioning the crude mill in about 5 to 50 wt. % based on the weight of the crude mill of a conditioning solvent.Type: GrantFiled: March 8, 2000Date of Patent: April 30, 2002Assignee: Sun Chemical CorporationInventors: Michael J. Willis, Paul A. Merchak, Russell J. Schwartz, Karii L. MacCune
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Patent number: 6375732Abstract: Hybrid pigments of diketopyrrolo[3,4-c]pyrrole pigments and pigments bearing “acid” hydrogens like —NH, —OH or —CONH— groups, a process for the manufacturing of the hybrid diketopyrrolo[3,4-c]pyrrole pigments with pigments bearing “acid” hydrogens like —NH, — OH or —CONH— groups and their use as a pigment.Type: GrantFiled: March 30, 2000Date of Patent: April 23, 2002Assignee: Clariant Finance (BVI) LimitedInventors: Bansi Lal Kaul, Bruno Piastra, Valérie Wolf