Patents by Inventor Ronald E. Bockrath

Ronald E. Bockrath 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).

  • High moduli polyimides
    Patent number: 5243024
    Abstract: Improved imide-containing copolymers comprising, in the aromatic diamine component, p-phenylene diamine and at least one additional aromatic diamine have increased rigidity and useful processability. The copolymers of this invention also may exhibit improved resistance to the detrimental effects of humid environments and retain mechanical properties at elevated temperatures after exposure to humid environments.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: September 7, 1993
    Assignee: Amoco Corporation
    Inventors: Ronald E. Bockrath, Edward J. Gordon
  • Fiber-reinforced composites comprising amide-imide copolymer matrix resin
    Patent number: 5132394
    Abstract: Composites comprising polyamide-imide matrix resins derived from trimellitic acid compounds and an aromatic diamine are improved in moisture resistance when from 10 to about 90 mole % of the trimellitic acid compounds are replaced by biphenyl tetracarboxylic acid compounds.
    Type: Grant
    Filed: August 24, 1989
    Date of Patent: July 21, 1992
    Assignee: Amoco Corporation
    Inventor: Ronald E. Bockrath
  • Polyamide-imide composition based on bisphenoxyphenyl diamines
    Patent number: 4981942
    Abstract: Polyamide-imide compositions, including amic acid precursors thereto, having in their molecules recurring units based on aromatic tri- and tetracarbonyl moieties joined by a bisphenoxyphenyl structure exhibit a desirable combination of chemical, mechanical and thermal properties and retention of these properties on exposure to elevated temperatures even after saturation with water.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: January 1, 1991
    Assignee: Amoco Corporation
    Inventors: Ronald E. Bockrath, Bill W. Cole
  • Amide-imide resin of lowered water absorption for molding and composite applications
    Patent number: 4970292
    Abstract: Polyamide-imides derived from trimellitic acid compounds and an aromatic diamine are improved in moisture resistance when from 10 to about 90 mole % of the trimellitic acid compound is replaced by a biphenyl tetracarboxylic acid compound.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: November 13, 1990
    Assignee: Amoco Corporation
    Inventors: Ronald E. Bockrath, Robert B. Hanson
  • Polyamide-imide compositions from bisphenoxyphenyl diamine tricarboxylic anhydride and tetracarboxylic dianhydride
    Patent number: 4861855
    Abstract: Polyamide-imide compositions, including amic acid precursors thereto, having in their molecules recurring units based on aromatic tri- and tetracarbonyl moieties joined by a bisphenoxyphenyl structure exhibit a desirable combination of chemical, mechanical and thermal properties and retention of these properties on exposure to elevated temperatures even after saturation with water.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: August 29, 1989
    Assignee: Amoco Corporation
    Inventors: Ronald E. Bockrath, Bill W. Cole
  • Injection moldable amide-imide polymers containing calcium moieties
    Patent number: 4447574
    Abstract: Injection moldable homopolymers, copolymers, and terpolymers are prepared from fully or partially acylated aromatic diamines, aliphatic diamines or a mixture of these and aromatic tricarboxylic anhydride compounds or mixtures of tricarboxylic anhydrides and dicarboxylic acids. These polymers are improved by the addition of calcium moieties such as oxide, calcium acetate and calcium hydroxide. These polymers are useful for the preparation of injection molded articles.
    Type: Grant
    Filed: June 29, 1982
    Date of Patent: May 8, 1984
    Assignee: Standard Oil Company (Indiana)
    Inventors: Robert G. Keske, Gary T. Brooks, Ronald E. Bockrath
  • Injection moldable amide-imide polymers and copolymers containing metal oxides capable of forming hydrates stable at temperatures in excess of 500.degree. F.
    Patent number: 4403061
    Abstract: Injection moldable amide-imide homopolymers and copolymers containing metal oxides capable of forming hydrates stable at temperatures in excess of 500.degree. F. These amide-imides are useful in engineering plastics applications.
    Type: Grant
    Filed: June 29, 1982
    Date of Patent: September 6, 1983
    Assignee: Standard Oil Company (Indiana)
    Inventors: Gary T. Brooks, Ronald E. Bockrath
  • Aqueous crystallization of polyester
    Patent number: 4289874
    Abstract: Aqueous crystallization of polyester, particularly copolymeric polyethylene terephthalate in the presence of surface active agents.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: September 15, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventor: Ronald E. Bockrath
  • Process for upgrading prepolymer particles
    Patent number: 4226973
    Abstract: A horizontal, agitated, twin-shaft, jacketed vessel with adjustable vanes performs the functions of drying, crystallization, and solid phase polymerization for upgrading prepolymer particles.
    Type: Grant
    Filed: June 22, 1979
    Date of Patent: October 7, 1980
    Assignee: Standard Oil Company (Indiana)
    Inventors: Russell V. Malo, Gary A. Gustafson, Ronald E. Bockrath
  • Solid state polymerization
    Patent number: 4130551
    Abstract: Solid state polymerization of relatively low I.V. polyester using a water-soluble anti-stick agent.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: December 19, 1978
    Assignee: Standard Oil Company (Indiana)
    Inventors: Ronald E. Bockrath, Carl Serres
  • Solid state polymerization
    Patent number: 4008206
    Abstract: Solid state polymerization of relatively low I.V. polyester using an organic crystalline anti-stick agent having a melting point of at least 230.degree. C.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: February 15, 1977
    Assignee: Standard Oil Company (Indiana)
    Inventors: Gary R. Chipman, Ronald E. Bockrath