Patents by Inventor Herbert S. Chao
Herbert S. Chao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11117988Abstract: A macromonomer precursor is provided that includes a polymeric chain derived from farnesene and a single functional terminal end. The functional terminal end may include a hydroxyl group, an amino group, an epoxy group, an isocyanato group, or a carboxylic acid group. The terminal end of the macromonomer precursor may then be reacted with a (meth)acrylate to form a macromonomer having a (meth)acrylate functionalized terminal end that may be (co)polymerized with radically polymerizable monomers, such as alkyl(meth)acrylate monomers. Alternatively, a copolymer may be obtained by first deriving a poly(meth)acrylate from (meth)acrylate monomers having reactive groups that would allow the macromonomer precursors to be grafted onto the poly(meth)acrylate in a second step. The resulting copolymer may be incorporated as an additive in various formulations, such as a lubricant, a hydraulic fluid, a cosmetic composition, and an adhesive composition.Type: GrantFiled: December 18, 2019Date of Patent: September 14, 2021Assignee: Fina Technology, Inc.Inventors: Steven K Henning, Taejun Yoo, Herbert S Chao
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Publication number: 20200123285Abstract: A macromonomer precursor is provided that includes a polymeric chain derived from farnesene and a single functional terminal end. The functional terminal end may include a hydroxyl group, an amino group, an epoxy group, an isocyanato group, or a carboxylic acid group. The terminal end of the macromonomer precursor may then be reacted with a (meth)acrylate to form a macromonomer having a (meth)acrylate functionalized terminal end that may be (co)polymerized with radically polymerizable monomers, such as alkyl(meth)acrylate monomers. Alternatively, a copolymer may be obtained by first deriving a poly(meth)acrylate from (meth)acrylate monomers having reactive groups that would allow the macromonomer precursors to be grafted onto the poly(meth)acrylate in a second step. The resulting copolymer may be incorporated as an additive in various formulations, such as a lubricant, a hydraulic fluid, a cosmetic composition, and an adhesive composition.Type: ApplicationFiled: December 18, 2019Publication date: April 23, 2020Applicant: Fina Technology, Inc.Inventors: Steven K. Henning, Taejun Yoo, Herbert S. Chao
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Patent number: 10544241Abstract: A macromonomer precursor is provided that includes a polymeric chain derived from farnesene and a single functional terminal end. The functional terminal end may include a hydroxyl group, an amino group, an epoxy group, an isocyanato group, or a carboxylic acid group. The terminal end of the macromonomer precursor may then be reacted with a (meth)acrylate to form a macromonomer having a (meth)acrylate functionalized terminal end that may be (co)polymerized with radically polymerizable monomers, such as alkyl(meth)acrylate monomers. Alternatively, a copolymer may be obtained by first deriving a poly(meth)acrylate from (meth)acrylate monomers having reactive groups that would allow the macromonomer precursors to be grafted onto the poly(meth)acrylate in a second step. The resulting copolymer may be incorporated as an additive in various formulations, such as a lubricant, a hydraulic fluid, a cosmetic composition, and an adhesive composition.Type: GrantFiled: September 15, 2016Date of Patent: January 28, 2020Assignee: Fina Technology, Inc.Inventors: Steven K. Henning, Taejun Yoo, Herbert S. Chao
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Publication number: 20180072826Abstract: A macromonomer precursor is provided that includes a polymeric chain derived from farnesene and a single functional terminal end. The functional terminal end may include a hydroxyl group, an amino group, an epoxy group, an isocyanato group, or a carboxylic acid group. The terminal end of the macromonomer precursor may then be reacted with a (meth)acrylate to form a macromonomer having a (meth)acrylate functionalized terminal end that may be (co)polymerized with radically polymerizable monomers, such as alkyl(meth)acrylate monomers. Alternatively, a copolymer may be obtained by first deriving a poly(meth)acrylate from (meth)acrylate monomers having reactive groups that would allow the macromonomer precursors to be grafted onto the poly(meth)acrylate in a second step. The resulting copolymer may be incorporated as an additive in various formulations, such as a lubricant, a hydraulic fluid, a cosmetic composition, and an adhesive composition.Type: ApplicationFiled: September 15, 2016Publication date: March 15, 2018Applicant: Fina Technology, Inc.Inventors: Steven K. Henning, Taejun Yoo, Herbert S. Chao
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Patent number: 6454536Abstract: A thin film that forms an interface between metal surfaces and polymeric inserts of aircraft engine fan blades. The thin film is formed from a chemical comprised of carbon black, at least one evaporable solvent, a combination of phenolic-like resins dissolved in the solvent and the balance filler and inert ingredients. The thin film, upon drying of the evaporable solvent, forms a phenolic that bonds with the metallic portion of the fan blade. After the polymeric material is applied to recesses in the fan blade and cured, a chemical bond is formed between the thin film and the elastomeric inserts. The bonded structure has improved FWT peak stresses and improved fracture toughness.Type: GrantFiled: February 9, 2000Date of Patent: September 24, 2002Assignee: General Electric CompanyInventors: Charles R. Evans, Douglas D. Ward, Joseph T. Begovich, Jr., Wendy W. Lin, Herbert S. Chao
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Patent number: 6287080Abstract: A formulation used in the construction of lightweight aircraft engine fan blades. The formulation comprises a polyurethane elastomer composition, which is formed from a prepolymer, a curative and an antioxidant and molded into the blades. Optionally, a hindered amine light stabilizer and/or an ultraviolet absorber may be added to the formulation. The aircraft engine fan blade is formed from a metal, such as titanium alloy. Pockets are machined into the fan blade, so as to lessen the amount of metal used to construct the blade, thereby lowering the total weight of the blade. The formulation of the present invention is positioned in the pockets of the fan blade, so as to maintain the structural integrity of the blade against bird strikes and the like, while at the same time providing a fan blade which is significantly lighter than all-metal fan blades.Type: GrantFiled: November 15, 1999Date of Patent: September 11, 2001Assignee: General Electric CompanyInventors: Charles R. Evans, Douglas D. Ward, Wendy W. Lin, Herbert S. Chao, Joseph T. Begovich, Jr.
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Patent number: 5498440Abstract: The adhesion of metal coatings deposited by electroless deposition on polycarbonate-addition polymer substrates, especially polycarbonate-ABS substrates, is improved by first contacting the substrate with an alkali metal hydroxide solution followed by concentrated nitric acid.Type: GrantFiled: January 21, 1992Date of Patent: March 12, 1996Assignee: General Electric CompanyInventor: Herbert S. Chao
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Patent number: 5413817Abstract: Substrates comprising blends of at least one polyphenylene ether and at least one poly(alkenylaromatic compound) (e.g., polystyrene) are treated with aqueous tetravalent cerium in a concentration of at least about 0.1 M, preferably acidified with nitric acid, to improve adhesion to metal coatings subsequently deposited nonelectrolytically; for example, by electroless deposition. The metallized articles are heat treated following metal deposition. Further metal coatings may be deposited, preferably followed by further heat treatment.Type: GrantFiled: November 5, 1993Date of Patent: May 9, 1995Assignee: General Electric CompanyInventors: Herbert S. Chao, Carol L. Fasoldt
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Patent number: 5316867Abstract: Addition polymer substrates comprising structural groups derived from olefinic nitriles and conjugated dienes, especially ABS resin substrates, are treated with aqueous tetravalent cerium in a concentration of at least about 0.1 M, preferably with a tetravalent cerium solution, to improve adhesion to metal coatings subsequently deposited non-electrolytically; for example, by electroless deposition. The metallized articles are heat treated following metal deposition. Further metal coatings may be deposited, preferably followed by further heat treatment.Type: GrantFiled: May 17, 1993Date of Patent: May 31, 1994Assignee: General Electric CompanyInventors: Herbert S. Chao, Carol L. Fasoldt
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Patent number: 5286530Abstract: Cyanate ester polymer articles, particularly fiber-reinforced, are metallized by electroless deposition preceded by a series of pretreatment steps which improve adhesion of the metal layer or layers. Said steps include aqueous alkali followed by nitric acid treatment. They preferably also include an initial alkaline permanganate treatment, preferably preceded by aqueous alkali.Type: GrantFiled: January 13, 1993Date of Patent: February 15, 1994Assignee: General Electric CompanyInventors: Bradley R. Karas, Herbert S. Chao
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Patent number: 5264248Abstract: The adhesion of metal coatings, such as those produced by electroless or physical vapor deposition, on polypyromellitimide surfaces is improved by prior treatment of the surface with concentrated sulfuric acid, followed by aqueous alkali metal hydroxide of at least about 2M concentration. Further metal may be deposited on the surface, for example by electrolytic or physical vapor deposition, following the original metal deposition.Type: GrantFiled: August 3, 1992Date of Patent: November 23, 1993Assignee: General Electric CompanyInventors: Herbert S. Chao, Bradley R. Karas
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Patent number: 5229169Abstract: The adhesion of metal coatings deposited by electroless deposition on polycarbonate-addition polymer substrates, especially polycarbonate-ABS substrates, containing up to about 85% (by weight) polycarbonate is improved by first contacting the substrate with an alkali metal hydroxide solution for about 1-2 minutes, followed by an alkaline permanganate solution and a reducing agent to remove any manganese residue.Type: GrantFiled: January 21, 1992Date of Patent: July 20, 1993Assignee: General Electric CompanyInventor: Herbert S. Chao
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Patent number: 5213886Abstract: Curable compositions contain a low molecular weight polyphenylene ether and a polyepoxide composition containing brominated and non-brominated bisphenol polyglycidyl ethers, in combination with further components including specific catalysts. Said compositions are preferably free from hardeners for epoxy resins. They may be used in the preparation of bonding sheets which are useful in the manufacture of multilayer printed circuit assemblies and which have excellent physical and electrical properties.Type: GrantFiled: June 22, 1992Date of Patent: May 25, 1993Assignee: General Electric CompanyInventors: Herbert S. Chao, Robert E. Colborn, James R. Presley, Jana M. Whalen, Michael J. Davis, James E. Tracy, Edward F. Chu
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Patent number: 5162450Abstract: Curable compositions contain a low molecular weight polyphenylene ether and a polyepoxide composition containing brominated and non-brominated bisphenol polyglycidyl ethers, in combination with further components including specific catalysts. Said compositions are preferably free from hardeners for epoxy resins. They may be used in the preparation of bonding sheets which are useful in the manufacture of multilayer printed circuit assemblies and which have excellent physical and electrical properties.Type: GrantFiled: January 3, 1990Date of Patent: November 10, 1992Assignee: General Electric CompanyInventors: Herbert S. Chao, Robert E. Colborn, James R. Presley, Jana M. Whalen, Michael J. Davis, James E. Tracy, Edward F. Chu
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Patent number: 5141791Abstract: Compositions comprising a polyepoxy compound (preferably bisphenol A diglycidyl ether) and a polyphenylene ether which has been melt processed (e.g., by extrusion) at a temperature in the range of about 230.degree.-390.degree. C., are cured at temperatures in the range of about 190.degree.-250.degree. C. by various epoxy cure catalysts. They may used in the preparation of laminates with excellent dielectric properties, solvent resistance and solder resistance, useful in printed circuit board production.Type: GrantFiled: June 27, 1990Date of Patent: August 25, 1992Assignee: General Electric CompanyInventors: Herbert S. Chao, Jana M. Whalen
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Patent number: 5001010Abstract: Compositions comprising a polyepoxy compound (preferably bisphenol A diglycidyl ether) and a polyphenylene ether which has been melt processed (e.g., by extrusion) at a temperature in the range of about 230.degree.-390.degree. C., are cured at temperatures in the range of about 190.degree.-250.degree. C. by various epoxy cure catalysts. They may be used in the preparation of laminates with excellent dielectric properties, solvent resistance and solder resistance, useful in printed circuit board production.Type: GrantFiled: October 11, 1988Date of Patent: March 19, 1991Assignee: General Electric CompanyInventors: Herbert S. Chao, Jana M. Whalen
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Patent number: 4937309Abstract: Described are select polyarylethersulfones polymers which are useful for molding into a circuit board substrte. When metal is electroplated onto such a substrate, there is a high degree of adhesion of the metal to the circuit board.Type: GrantFiled: August 14, 1989Date of Patent: June 26, 1990Assignee: Amoco CorporationInventors: Herbert S. Chao, James E. Harris, Stephen B. Rimsa
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Patent number: 4845159Abstract: Iodonation of novolak resin or polyphenylene ether followed by the metatheses of the resulting iodonated product with a polyhalometal or metalloid salt can provide a photoactive cure catalyst or thermally active cure catalyst for cationically polymerizable organic materials. A copper cocatalyst has been found useful in thermal curing.Type: GrantFiled: October 1, 1987Date of Patent: July 4, 1989Assignee: General Electric CompanyInventor: Herbert S. Chao
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Patent number: 4808674Abstract: Aryl ester-grafter polyphenylene ethers are prepared by heating a polyphenylene ether with an olefinic aryl ester, usually an unsubstituted or substituted phenyl acrylate. The products react with lactams such as .epsilon.-caprolactam in the presence of lactam polymerization catalysts to produce phenylene ether-amide copolymers.Type: GrantFiled: August 24, 1987Date of Patent: February 28, 1989Assignee: General Electric CompanyInventors: Bruce C. Johnson, Thomas W. Hovatter, Steven T. Rice, Herbert S. Chao
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Patent number: 4678839Abstract: Mixtures of polyphenylene ethers, lactams such as .epsilon.-caprolactam and lactam polymerization catalysts, preferably basic reagents, may be polymerized. There is preferably also present a lactam polymerization promoter, especially a functionalized polyphenylene ether. Polymerization produces resinous compositions including phenylene etheramide copolymers, especially block and/or graft copolymers. Said resinous compositions may be molded into articles having a number of advantageous properties.Type: GrantFiled: July 8, 1985Date of Patent: July 7, 1987Assignee: General Electric CompanyInventors: John E. Hallgren, Peter P. Policastro, Herbert S. Chao, Bruce C. Johnson