Patents by Inventor Douglas A. McCullough

Douglas A. McCullough 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).

  • Propylene polymer compositions
    Patent number: 4459385
    Abstract: Extruded or molded shapes of compositions consisting essentially of certain sequentially polymerized ethylene-propylene copolymers and linear low density polyethylene of relatively low melt index (ASTM D1238-Condition E), not exceeding 5 dg/min, and density not exceeding 0.928, possess extremely good impact resistance without excessive loss of stiffness.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: July 10, 1984
    Assignee: Shell Oil Company
    Inventor: J. Douglas McCullough, Jr.
  • Polybutylene modified masterbatches for impact resistant polypropylene
    Patent number: 4311807
    Abstract: An impact resistant polypropylene prepared with a masterbatch comprising an uncured elastomer, a butene-1 polymer and an optional comodifier such as high density polyethylene possesses improved weld line strength and other properties.
    Type: Grant
    Filed: July 22, 1980
    Date of Patent: January 19, 1982
    Assignee: Shell Oil Company
    Inventors: J. Douglas McCullough, Jr., Louis C. Rhodes