Patents Examined by Katarzyna W. Lee
  • Patent number: 6689821
    Abstract: Thermosetting paint film is removed by adding plastic resin coated with thermosetting paint film into a mixed solution of an alcoholic solvent and alkali and heating this mixed solution while stirring. Isopropyl alcohol, phenoxy alcohol and alkali are added in a reactor and heated to a temperature of 50-70° C. while stirring. Plastic resin coated with thermosetting paint film is added and a reaction is performed while maintaining the temperature. The isopropyl alcohol and phenoxy alcohol are added in a mixed ratio of 70-90:30-10.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: February 10, 2004
    Assignee: Hyundai Motor Company
    Inventors: Seong Taek Na, John Hee Hong
  • Patent number: 6642301
    Abstract: A pigment dispersion comprising pigment, an aqueous carrier selected from water and a mixture of water and at least one organic solvent, and a pigment dispersant is described. The pigment dispersant is prepared by controlled radical polymerization, e.g.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: November 4, 2003
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Daniela White, Simion Coca, James B. O'Dwyer
  • Patent number: 6638994
    Abstract: The invention relates to an aqueous suspension of particles, said particles comprising an organic active ingredient. A controlled release of the ingredient occurs. The invention is especially suitable for the controlled release of organic agrochemical active ingredients useful in crop sciences, such as pesticides.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: October 28, 2003
    Inventors: Regan Crooks, Mathieu Joanicot, Robert K. Prud'Homme, Joel Coret
  • Patent number: 6632870
    Abstract: Flame-retarded transparent plastic compositions comprising polyhalgenated trimethylphenyl indan. The polyhalogenated trimethylphenyl indan is a mixture of polyhalogenated trimethylphenyl indanes having each 3 to 9 halogen atoms. The halogen may be bromine or a mixture of bromine and chlorine. The transparent plastic is selected from polycarbonate, polymethylmethacrylate, and polystyrene. The polyhalogenated trimethylphenyl indan is present in an amount of up to about 40% by weight. The transparent plastic flame-retarded material is prepared by mixing the plastic matrix with a flame-retardant effective amount of a polyhalogenated trimethylphenyl indan.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: October 14, 2003
    Assignee: Bromine Compounds Ltd.
    Inventors: Ita Finberg, Lev Utevski
  • Patent number: 6596803
    Abstract: The invention is directed to a polymer-clay nanocomposite material comprising a melt-processible matrix polymer and a layered clay material having low quartz content. This invention is also directed to a process for preparing a polymer-clay nanocomposites, and articles or products produced from nanocomposite materials.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: July 22, 2003
    Assignee: AMCOL International Corporation
    Inventors: Tie Lan, Vasiliki Psihogios, Shriram Bagrodia, Louis Thomas Germinario, John Walker Gilmer
  • Patent number: 6583210
    Abstract: The present invention relates to a tire with a carbon black-containing, black-colored, circumferential tread of a cap/base construction, wherein said tread cap has a lug and groove configuration and wherein the outer surface of a major portion of said grooves are designed to be ground contacting, and a co-extruded thin outer non-carbon black-containing rubber layer of a non-black color wherein said outer rubber layer is integral with and circumferentially extends from the axial outer edge of said tread cap to include at least of a visible surface of at least one groove in said tread cap. In one aspect, said tread contains a pair of black colored, carbon black reinforced, tread miniwings which extend from the axial outer edge of the tread over a portion of the tire sidewall, wherein said thin outer rubber layer joins said miniwing and wherein said tread cap, tread base, tread miniwings and thin outer layer are co-extruded, co-cured and therefore integral with each other.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: June 24, 2003
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: David John Zanzig, George Frank Balogh, Paul Harry Sandstrom
  • Patent number: 6583217
    Abstract: A composite material and method are described wherein melted waste, chemically unmodified PET material and fly ash particles are mixed in a vessel to disperse fly ash particles in the melted PET material. The resulting mixture then is cooled to solidify the melted PET material to form a composite material having a matrix comprising PET and dispersoids distributed in the matrix and comprising fly ash particles.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: June 24, 2003
    Assignees: Iowa State University Research, Inc., The Curators of the University of Missouri
    Inventors: Yadong Li, R. Lee Peyton, David J. White
  • Patent number: 6579930
    Abstract: The present invention relates to tires and vehicular tracks having minimal-marking rubber treads and particularly to skid steering, fixed axle, tire/wheel or track assemblies where said tire or vehicular track has a minimal-marking tread. In particular, such rubber tread has a surface intended to be ground-contacting which is also intended to be minimal-marking and having suitable physical properties for a tire tread.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: June 17, 2003
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: James Robert Herberger, Sr., Lewis Timothy Lukich
  • Patent number: 6579920
    Abstract: The addition of microspheres of barium titanate glass to conventional friction compositions for molding automotive and other brake elements and similar friction elements, results in substantial new and unexpected improvements with respect to the production of and processing of uniform, homogeneous molding compositions for forming the present friction elements. The formed friction pads, disks etc., have unexpectedly improved performance properties such as heat dissipation properties leading to improved, reduced wear over prolonged periods of use.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: June 17, 2003
    Assignee: Prizmalite
    Inventors: David Burnett, Robert Schleifstein
  • Patent number: 6569937
    Abstract: A conducting polymer composite that is crosslinked comprising a semicrystalline polymer minor phase with conducting filler material dispersed therein in an amount sufficient to generate a continuous conductive network in the minor phase, and which is mixed with major phase polymers, the materials being selected such that the minor phase and major phases will not engage in electrostatic interactions that promote miscibility. The minor phase being dispersed in the major phase in an amount sufficient to generate a continuous conductive network in the composite material. The composite material is crosslinked by physical or chemical means. The crosslinked conducting polymer composite having a reduced amount of conducting filler while supporting a continuous conductive network in the crosslinked polymer composite.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: May 27, 2003
    Assignee: Pirelli Cables and Systems, LLC
    Inventors: Stephen H. Foulger, Jeffrey M. Quinn, Thierry T. Trial
  • Patent number: 6566412
    Abstract: A method and apparatus is disclosed for recovering the rubber content of rubber containing goods such as vehicle tires. The goods are purged of air and immersed in a bath of liquid heated to a temperature sufficient to melt the rubber. The rubber being insoluble in the bath and of less density than the bath, it rises to the surface of the bath and is removed. The process employs a perforated process tube in which the goods are passed in the bath.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: May 20, 2003
    Inventor: Lee H. Varner
  • Patent number: 6552113
    Abstract: This invention is directed to a polymer-clay nanocomposite, products produced from the nanocomposite, and a process for preparing a polymer-clay nanocomposite. The polymer-clay nanocomposite comprises (a) a matrix polymer, (b) an amorphous oligomer, and (c) a layered clay material.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: April 22, 2003
    Assignee: University of South Carolina Research Foundation
    Inventors: Shriram Bagrodia, Linda Gail Bernard, Gary Wayne Connell, John Walker Gilmer, Tie Lan, James Christopher Matayabas, Jr., Jeffrey Todd Owens, Vasiliki Psihogios, Emerson Eston Sharpe, Jr., Sam Richard Turner
  • Patent number: 6548586
    Abstract: A composition useful for making in-situ silicon carbide whiskers and fibers in an inorganic composite matrix selected from silicon carbide carbon and carbon composite matrix, wherein the said composition comprises: Natural Fiber (1.6-6.5 Wt %); TetraEthyl Orthosilicate (10.4-42 Wt %); Phenolic Resin (38-73.5 Wt %); Curing agent (4.2-11 Wt %); Optionally, Silicon Carbide (9.4-12 Wt %); Organic Solvent (requisite amount to dissolve the Phenolic resin). The fiber preferably is a natural fiber selected from the group consisting of jute, sisal, hem and other natural fiber having cellulosic or hemicellulosic constituent at its backbone. The curing agent preferably is selected from hexamine, para toluenesulphonic acid and para formaldehyde, most preferably hexamine. The molecular weight of phenolic resin preferably is in the range of 450-700, and the organic solvent preferably is selected from methanol, toluene and benzene.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: April 15, 2003
    Assignee: Council of Scientific & Industrial Research
    Inventors: Kalyan Kumar Phani, Asok Kumar De, Nripati Ranjan Bose, Sankar Ghatak
  • Patent number: 6545061
    Abstract: Disclosed herein is a process for depolymerizing and purifying recyclable PET comprising the steps of: (a) conducting acetolysis on recyclable PET to form terephthalic acid and ethylene glycol diacetate; (b) reacting the terephthalic acid with methanol to form dimethyl terephthalate; and (c) reacting the dimethyl terephthalate with the ethylene glycol diacetate under transesterification and polycondensation conditions to form both a PET product with an unusually low concentration of copolymerized diethylene glycol and methyl acetate. Further disclosed is a process wherein the above process is efficiently combined with a process for producing cellulose acetate. In addition to steps (a)-(c), the combination process additionally comprises the steps of: (d) carbonylating the methyl acetate with carbon monoxide to form acetic anhydride; and (e) acetylating cellulose with the acetic anhydride to form cellulose acetate and acetic acid, with the acetic acid being useful in step (a).
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: April 8, 2003
    Assignee: Eastman Chemical Company
    Inventor: William Speight Murdoch
  • Patent number: 6534565
    Abstract: Friction materials for clutch, brake shoes and the like are formed of a paper having reduced or eliminated non-functional processing additives. The paper composition includes components selected from a group consisting of aramid pulp, aramid staple, carbon/polyacrylonitrile fibers, glass wool, potassium octatitanate, bronze wool, high surface area filter cake, graphite, amorphous carbon and cyanated phenolic resin. The paper composition may be pre-compounded to a particle size in the range of 60 to 200 mesh. Part molding may be carried out by microwave heating the paper at 250° to 55° F.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: March 18, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Thomas Haley Gardner, Robert Anthony Lamport
  • Patent number: 6531544
    Abstract: The present invention relates to using certain block copolymer based hot melt adhesive compositions for the assembly of disposable absorbent articles such as disposable diapers wherein the adhesive is in contact with an oil-based skin care ingredient, and the resulting disposable absorbent article. The adhesive is particularly useful for adhesively bonding elastic to nonwoven, and exhibits good stress resistance in the presence of lotion.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: March 11, 2003
    Assignee: H.B. Fuller Licensing & Financing, Inc.
    Inventors: Steve R. Vaughan, Greg J. Van Lith, Larry S. Flanagan
  • Patent number: 6530410
    Abstract: As the present invention there is disclosed a pneumatic radial tire comprising a carcass having a smaller tensile rigidity than that of conventional pneumatic radial tires by application of a steel cord having a smaller Young's modulus to the carcass or by application of a smaller amount of a high strength steel cord formed with carcass filaments having a greater tensile strength to the carcass while maintaining the necessary strength of the carcass. In accordance with the present invention, extension of the carcass increases and extension of a belt in the circumferential direction of the tire is suppressed when the tire is inflated by an inner pressure. As a result, compression stress working on the carcass when a vehicle turns decreases and buckling deformation of the steel cord can be prevented. Accordingly, durability is improved.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: March 11, 2003
    Assignee: Bridgestone Corporation
    Inventor: Naohiko Obana
  • Patent number: 6528546
    Abstract: Disclosed are methods of recycling the components of composite articles and materials comprising hydroxy-phenoxyether polymers to facilitate reuse of such components. The recycling methods comprise dissolution of the hydroxy-phenoxyether polymer in an acidic solution which is separated from the other components which formed the composite article or material. The hydroxy-phenoxyether polymers may be reused as the acidic solution, or they may be precipitated by addition of a base prior to reuse.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: March 4, 2003
    Assignee: Advanced Plastics Technologies, Ltd.
    Inventors: Robert A. Lee, Gerald A. Hutchinson, Basharat A. Nazir
  • Patent number: 6525128
    Abstract: This invention relates to a rubber composition comprised of a halogenated (e.g. brominated) copolymer of isobutylene and p-methyl styrene elastomer reinforced with synthetic particulate silica-based reinforcement together with an organo phosphite to aid in enhancing the silica reinforcement of the halogenated isobutylene copolymer elastomer. Preferably, the rubber composition is comprised of a combination of a brominated copolymer of isobutylene and p-methyl styrene and at least one diene-based elastomer. The invention further relates to an article of manufacture, including a tire, having at least one component comprised of such rubber composition.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: February 25, 2003
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: David John Zanzig
  • Patent number: 6518322
    Abstract: Decontaminated crushed polyethylene terephthalate is converted to decontaminated PBT withtout requiring a catalyst by mixing with 1,4-butanediol under reduced pressure, transeterifying at 120-190° C., distilling off ethanediol and tetrahydrofuran under sub-atomspheric pressure. The method lowers costs, and decreases wasteful by-products and removes contaminants present in post-consumer PET, (e.g. paper, pigments, plastics, dyes, mineral sands, and clays) and chemical and water insoluble contaminants.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: February 11, 2003
    Assignee: Petrecycle Pty Ltd.
    Inventor: Simon M. West