Patents by Inventor Norman Bilow
Norman Bilow 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: 4864016Abstract: A protective coating for solar cells, particularly solar cells positioned in space and which coating is a polyimide which is colorless, transparent, relatively non-brittle, has a high degree of thermal stability and readily transmits solar radiation without appreciable degradation. The coating is heat resistant and does not degrade significantly when exposed to ultraviolet radiation, and is highly effective in repelling low energy proton particles.Type: GrantFiled: January 18, 1985Date of Patent: September 5, 1989Assignee: Hughes Aircraft CompanyInventors: Preston S. DuPont, Norman Bilow
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Patent number: 4592925Abstract: A protective coating for solar cells, particularly solar cells positioned in space and which coating is a polyimide which is colorless, transparent, relatively non-brittle, has a high degree of thermal stability and readily transmits solar radiation without appreciable degradation. The coating is heat resistant and does not degrade significantly when exposed to ultraviolet radiation, and is highly effective in repelling low energy proton particles.Type: GrantFiled: January 18, 1985Date of Patent: June 3, 1986Assignee: Hughes Aircraft CompanyInventors: Preston S. Du Pont, Norman Bilow
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Patent number: 4534882Abstract: A method of making an epoxy prepolymer curing agent is disclosed. The method comprises the steps of reacting a mixture of piperidine and an epoxy resin so as to form an epoxy prepolymer adduct. The adduct is mixed with 2-ethyl-4-methylimidazole thereby forming the curing agent composition.Type: GrantFiled: September 4, 1984Date of Patent: August 13, 1985Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, Ralph D. Hermansen
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Patent number: 4393101Abstract: A high char yielding matrix resin for use in fabricating carbon-carbon composites comprised of a polymerizable mixture of a diethynylbenzene monomer and an ethynylpyrene monomer.Type: GrantFiled: June 11, 1982Date of Patent: July 12, 1983Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Norman Bilow
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Patent number: 4369297Abstract: A high char yielding matrix resin for use in fabricating carbon-carbon composites comprised of a polymerizable mixture of a diethynylbenzene monomer and an ethynylpyrene monomer.Type: GrantFiled: September 30, 1981Date of Patent: January 18, 1983Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Norman Bilow
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Patent number: 4324830Abstract: A high char yielding matrix resin for use in fabricating carbon-carbon composites comprised of a polymerizable mixture of a diethynylbenzene monomer and an ethynylpyrene monomer.Type: GrantFiled: November 17, 1980Date of Patent: April 13, 1982Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Norman Bilow
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Patent number: 4284834Abstract: Diethynyl substituted aromatic hydrocarbons are prepared which homopolymerize into resins suitable for use as high char materials.Type: GrantFiled: December 26, 1979Date of Patent: August 18, 1981Assignee: Hughes Aircraft CompanyInventors: William B. Austin, Norman Bilow
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Patent number: 4276407Abstract: Improved diimide and polyimide oligomers containing phenylacetylene terminal groups have been produced which melt at low temperatures and are curable into useful laminating resins, molding compounds and matrix resins. These oligomers are analogous to diimides and polyimides made from conventional dianhydrides, such as benzophenonetetracarboxylic dianhydride or pyromellitic dianhydride.Type: GrantFiled: August 16, 1979Date of Patent: June 30, 1981Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, Abraham L. Landis
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Patent number: 4188337Abstract: The present invention is directed to a novel class of polynitrile (polycyano) substituted polyimide oligomers and the polyamic acid or ester precursors thereof. The nitrile groups on the oligomers allow the compounds to be cured through addition reactions which result in little or no outgassing. In addition, these oligomers are curable with heat in the presence of catalysts such as those which induce cyano trimerizations. The fully cured polyimides derived from these oligomers have excellent thermal and mechanical properties at high temperatures.Type: GrantFiled: July 28, 1978Date of Patent: February 12, 1980Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, Abraham L. Landis, Leroy J. Miller
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Patent number: 4183869Abstract: Novel thermosetting oligomers are formed by reacting epoxy prepolymers with aminoarylacetylenes. When heated to 170.degree. C. or above, these oligomers undergo acetylenic polymerization to form resins which exhibit superior thermal and hydrolytic stability when compared to conventionally cured epoxy resins.Type: GrantFiled: August 4, 1978Date of Patent: January 15, 1980Assignee: Hughes Aircraft CompanyInventor: Norman Bilow
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Patent number: 4180649Abstract: Acetylene-substituted tetraimines are synthesized to form oligomers or prepolymers having melting points as low as 40.degree. C. and which can be polymerized into thermoset plastics at temperatures as low as 150.degree. C.Type: GrantFiled: November 20, 1978Date of Patent: December 25, 1979Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, William B. Austin
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Patent number: 4178430Abstract: Acetylene-substituted Schiff's bases are prepared by the reaction of either acetylene-substituted amines and dicarboxaldehydes or acetylene-substituted aldehydes and diamines.These compounds are polymerizable and in some examples they yield conjugated polymers useful in the fabrication of conductors and semiconductors.Type: GrantFiled: November 20, 1978Date of Patent: December 11, 1979Assignee: Hughes Aircraft CompanyInventor: Norman Bilow
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Patent number: 4129570Abstract: The present invention is directed to a novel class of polynitrile (polycyano) substituted polyimide oligomers and the polyamic acid or ester precursors thereof. The nitrile groups on the oligomers allow the compounds to be cured through addition reactions which result in little or no outgassing. In addition, these oligomers are curable with heat in the presence of catalysts such as those which induce cyano trimerizations. The fully cured polyimides derived from these oligomers have excellent thermal and mechanical properties at high temperatures.Type: GrantFiled: July 6, 1976Date of Patent: December 12, 1978Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, Abraham L. Landis, Leroy J. Miller
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Patent number: 4108836Abstract: A dianhydride is converted into an alcohol-soluble di-ester and subsequently used to form a lacquer with a mixture of a diamine and an aminoarylacetylene. When the solvent is removed and the mixture of compounds is heated to a curing temperature a cured acetylene-end-capped polyimide polymer is produced.Type: GrantFiled: March 3, 1977Date of Patent: August 22, 1978Assignee: Hughes Aircraft CompanyInventor: Norman Bilow
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Patent number: 4100138Abstract: A new class of copolymers obtained via the copolymerization of diethynylbenzene with an ethynyl-substituted polyimide oligomer has been used to prepare composite materials exhibiting zero void content. The copolymers are thermosetting in character and are particularly useful for the fabrication of composite structures such as glass fiber reinforced laminates and molding compounds and graphite fiber reinforced laminates and molding compounds.Type: GrantFiled: May 12, 1975Date of Patent: July 11, 1978Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, Boyce G. Kimmel
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Patent number: 4098767Abstract: A new class of copolymers obtained via copolymerizing diethynylbenzene with an ethynyl substituted polyimide oligomer has been developed. The copolymers are thermosetting in character and are particularly useful for the fabrication of composite structures such as glass fiber reinforced laminates and molding compounds and graphite fiber reinforced laminates and molding compounds having zero void content.Type: GrantFiled: November 25, 1974Date of Patent: July 4, 1978Assignee: Hughes Aircraft CompanyInventor: Norman Bilow
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Patent number: 4075111Abstract: Self-lubricating composites of high thermal stability, excellent frictional characteristics and wear resistance are formulated from molybdenum disulfide, tungsten disulfide, molybdenum diselenide and thermosetting acetylene-substituted polyimide oligomers.Type: GrantFiled: April 19, 1976Date of Patent: February 21, 1978Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, Michael N. Gardos
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Copolymer of polyimide oligomers and terephthalonitrile N,N-dioxide and their methods of preparation
Patent number: RE30217Abstract: We have disclosed a new class of thermosetting copolymers derived from terephthalonitrile N,N'-dioxide and polyimide oligomer that cure through addition reactions to form essentially void-free cured resins that exhibit outstanding high temperature stability. These copolymers may be formed from either acetylene terminated polyimide oligomers or nitrile terminated polyimide oligomers. Copolymers prepared in accordance with our invention exhibit little or no outgassing during cure and are extremely useful in the preparation of laminates where high temperature stability and high strength is required.Type: GrantFiled: April 24, 1978Date of Patent: February 19, 1980Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, Abraham L. Landis, Leroy J. Miller -
Patent number: RE33079Abstract: Polyimides are prepared from acetylene substituted polyimide oligomers via an addition polymerization reaction which involves homopolymerization. These polymers exhibit low void content when cured and possess superior thermal stability characteristics and physical properties such as structural strength. One of their unique properties is their ability to be processed into useful articles at moderate pressures and temperatures.Type: GrantFiled: March 5, 1979Date of Patent: October 3, 1989Assignee: Hughes Aircraft CompanyInventors: Norman Bilow, Abraham L. Landis, Leroy J. Miller