Patents by Inventor Roger W. Avakian

Roger W. Avakian 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).

  • Multilayer structure
    Patent number: 4935309
    Abstract: Structures built up from at least two layers one layer of which is built up from a polyalkylene phthalate ester film and one layer of which is built up from a polystyrene film.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: June 19, 1990
    Assignee: General Electric Company
    Inventors: Michael Krieg, Vladimir Kwiecinski, Wilhelmus J. L. A. Hamersma, Roger W. Avakian
  • Enhancing color stability to sterilizing radiation of polymer compositions
    Patent number: 4882366
    Abstract: Compounds having defined nitrogen containing functional groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: November 21, 1989
    Assignee: General Electric Company
    Inventors: Linda H. Nelson, Roger W. Avakian, Arnold Factor
  • Enhancing color stability of sterilizing radiation of polymer compositions
    Patent number: 4880856
    Abstract: Compounds having defined thiazole functional groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: November 14, 1989
    Assignee: General Electric Company
    Inventor: Roger W. Avakian
  • Enhancing color stability to sterilizing radiation of polymer compositions
    Patent number: 4880854
    Abstract: Compounds having defined triazine functional groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: November 14, 1989
    Assignee: General Electric Company
    Inventor: Roger W. Avakian
  • Enhancing color stability to sterilizing radiation of polymer compositions
    Patent number: 4880850
    Abstract: Compounds having defined functional groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.
    Type: Grant
    Filed: February 7, 1989
    Date of Patent: November 14, 1989
    Assignee: General Electric Company
    Inventors: Linda H. Nelson, Roger W. Avakian, Arnold Factor
  • Enhancing color stability to sterilizing radiation of polymer compositions
    Patent number: 4880853
    Abstract: Compounds havign defined ketone functional groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: November 14, 1989
    Assignee: General Electric Company
    Inventors: Linda H. Nelson, Roger W. Avakian, Arnold Factor
  • Enhancing color stability to sterilizing radiation of polymer compositions
    Patent number: 4880855
    Abstract: Compounds having defined sulfone functional groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: November 14, 1989
    Assignee: General Electric Company
    Inventors: Linda H. Nelson, Roger W. Avakian, Arnold Factor
  • Enhancing color stability to sterlizing radiation of polymer compositions
    Patent number: 4876309
    Abstract: Pyran-derived compounds having defined functional groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: October 24, 1989
    Assignee: General Electric Company
    Inventors: Linda H. Nelson, Roger W. Avakian, Arnold Factor
  • Enhancing color stability to sterilizing radiation of polymer compositions
    Patent number: 4874783
    Abstract: Compounds having defined unsaturated alicyclic groups are described which color stabilize aromatic carbonate polymers or blends therewith upon exposure to sterilizing radiation.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: October 17, 1989
    Assignee: General Electric Company
    Inventors: Linda H. Nelson, Roger W. Avakian, Arnold Factor
  • Modified polyphenylene ether-polyamide compositions and process
    Patent number: 4873286
    Abstract: Novel modified polyphenylene ether-polyamide compositions comprising polyphenylene ether, polyamide and a polycarboxylic acid and the reaction product thereof and an improved process for preparing the same.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: October 10, 1989
    Assignee: General Electric Company
    Inventors: Robert R. Gallucci, Roelof van der Meer, Roger W. Avakian
  • Stabilized polyphenylene ether-polyamide compositions
    Patent number: 4857575
    Abstract: Large molded parts made of polyphenylene ether-polyamide resin can be improved with respect to retention of physical properties after thermal aging which is accomplished by the incorporation therein of certain effective metal salts such as CuI, CuCl.sub.2, and Cu(OAc).sub.2.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: August 15, 1989
    Assignee: General Electric Company
    Inventors: Roelof F. van der Meer, Roger W. Avakian
  • Method for enhancing ionizing radiation
    Patent number: 4778656
    Abstract: The tendency of polymers which are normally transparent after molding to undergo yellowing upon exposure to ionizing radiation is reduced by blending them with another polymer that has the effect of improving the ionizing radiation resistance over and above a mere dilution effect. The blends are moldable into medical products that can be sterilized repeatedly with little or no yellowing.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: October 18, 1988
    Assignee: General Electric Company
    Inventors: Richard B. Allen, Roger W. Avakian
  • Ultraviolet light stable flame retarded polycarbonate blends
    Patent number: 4741864
    Abstract: Discoloration in aromatic carbonate polymers brought about by the addition of halogenated flame retardants is counteracted by the further addition of aliphatic polyester.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: May 3, 1988
    Assignee: General Electric Company
    Inventors: Roger W. Avakian, Ronald J. Wroczynski
  • Foamable thermoplastic compositions, foamed articles and foaming method based on pre-compounded nucleating agent-resin concentrate
    Patent number: 4683247
    Abstract: Foamable thermoplastic compositions are described which are based on pre-compounded concentrated blends of an inorganic non-fibrous particulate foaming agent and a carrier polymer. The foamable thermoplastic polymer is selected from among aromatic polycarbonates alone or with acrylonitrile-butadiene-styrene copolymers polyesters, poly(ester-carbonates), and polyetherimides. The foaming agent may optionally be added as part of the concentrate.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: July 28, 1987
    Assignee: General Electric Company
    Inventors: Richard B. Allen, Roger W. Avakian
  • Modified polyphenylene ether-polyamide compositions
    Patent number: 4659763
    Abstract: There are provided novel modified polyphenylene ether-polyamide compositions comprising polyphenylene ether, polyamide and a quinone compound for improved strength.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: April 21, 1987
    Assignee: General Electric Company
    Inventors: Robert R. Gallucci, Roger W. Avakian
  • Low temperature impact modified thermoplastic foam
    Patent number: 4616042
    Abstract: The low temperature impact strength of foam thermoplastic articles is increased with the addition of polysiloxane-polycarbonate block copolymer.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: October 7, 1986
    Assignee: General Electric Company
    Inventor: Roger W. Avakian
  • Foamable polycarbonate compositions, articles and methods
    Patent number: 4587272
    Abstract: A foamable thermoplastic composition comprising in admixture (a) a polycarbonate resin, alone, or with (b) a polyester resin, (c) a minor amount of a foaming agent and (d) a minor amount of a non-fibrous particulate agent comprising an organic polymeric material to nucleate the foam. The composition also contains a surface active agent compound, such as a silicone, a polyglycol ether, a fatty acid derivative or a mixture thereof, to enhance particulate dispersion and to reduce the surface tension.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: May 6, 1986
    Assignee: General Electric Company
    Inventors: Roger W. Avakian, Ronald E. Jodice
  • Stabilization of flame retardant polycarbonate-polyester compositions
    Patent number: 4555540
    Abstract: Blends of an aromatic polycarbonate a polyester, a halogenated flame retardant agent and a metal oxide synergist for the flame retardant are made more stable against transesterification reactions during high temperature processing by the inclusion of minor amounts of selected phosphorus-containing compounds, such as phosphorous acid or acid salt.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: November 26, 1985
    Assignee: General Electric Company
    Inventor: Roger W. Avakian
  • Foamable polycarbonate compositions, articles and methods
    Patent number: 4544677
    Abstract: A foamable thermoplastic composition comprising in admixture (a) a polycarbonate resin, alone, or with (b) a polyester, (c) a minor amount of a foaming agent and (d) a minor amount of an inorganic non-fibrous particulate nucleating agent, alone, or with a particulate organic polymeric material, wherein (d) has an aspect ratio of about 1 and a small particle size.
    Type: Grant
    Filed: April 10, 1984
    Date of Patent: October 1, 1985
    Assignee: General Electric Company
    Inventors: Richard B. Allen, Roger W. Avakian
  • Thermally stabilized polyetherimides
    Patent number: 4508861
    Abstract: A thermally stabilized polyetherimide composition is disclosed which contains a polyetherimide and a stabilizing amount of an antioxidant having a molecular weight of 400 and is selected from the group of hindered phenols, aryl phosphonites, organic phosphites, thioesters or mixtures thereof. The stabilized polyetherimides exhibit a prolonged stability under conditions of elevated temperatures.
    Type: Grant
    Filed: December 29, 1983
    Date of Patent: April 2, 1985
    Assignee: General Electric Company
    Inventor: Roger W. Avakian