Patents Represented by Attorney Robert G. Ladd
  • Patent number: 4705832
    Abstract: The toughness properties of a polyamide-imide copolymer are improved by the addition of polyetherimides. These copolymers are useful as engineering resins, films are molded objects.
    Type: Grant
    Filed: July 3, 1986
    Date of Patent: November 10, 1987
    Assignee: Standard Oil Company (Indiana)
    Inventor: Gary T. Brooks
  • Patent number: 4684674
    Abstract: Novel polyamide-imide-phthalamide copolymers and polyamide-imide copolymers containing aromatic sulfone polymers are disclosed. These copolymers are useful in the manufacture of molded objects and engineering resins.
    Type: Grant
    Filed: July 24, 1985
    Date of Patent: August 4, 1987
    Assignee: Standard Oil Company (Indiana)
    Inventor: Gary T. Brooks
  • Patent number: 4581264
    Abstract: A process for the manufacture of extruded articles by extruding polyamide-imide polymers and copolymers through melt flow channels and extrusion dies at ever increasing shear rates ranging from 0.1 sec.sup.-1 to about 2000 sec.sup.-1. The extruder barrel and melt flow channel temperatures range from about 480.degree. to about 600.degree. F. and the extrusion die temperatures range from about 575.degree. to about 680.degree. F. Also, the addition of polyetherimides and polysulfones is disclosed. Thin films, thin sheets and hollow tubes are disclosed. All these articles are useful in engineering applications requiring high temperature resistant plastics. Useful applications include use in the aerospace and automobile industry.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: April 8, 1986
    Assignee: Standard Oil Company (Indiana)
    Inventors: Donald B. Emery, Brian C. Connolly
  • Patent number: 4579773
    Abstract: Novel fiber fabric laminates impregnated with polyamide-imide and polyamide-imide-phthalamide copolymers are disclosed. The laminates are useful as engineering materials for the replacement of metals.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: April 1, 1986
    Assignee: Standard Oil Company (Indiana)
    Inventors: Bill W. Cole, Gary T. Brooks