Patents by Inventor J. Douglas McCullough, Jr.

J. Douglas McCullough, Jr. 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).

  • Nucleation process for inducing crystallization in poly(alpha olefins)
    Patent number: 4801637
    Abstract: The present invention relates to a process for nucleating olefin polymers prepared with high activity MgCl.sub.2 -supported Ti procatalysts and aluminum alkyl cocatalysts, the process involving heat treating the olefin polymers after polymerization and before melt compounding with an alcoholic solution of an aromatic carboxylic acid.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: January 31, 1989
    Assignee: Shell Oil Company
    Inventor: J. Douglas McCullough, Jr.
  • High toughness propylene polymer compositions
    Patent number: 4588775
    Abstract: Blends of sequentially polymerized ethylene-propylene copolymers, high density ethylene homopolymers, EPM or EPDM rubber and linear low density polyethylene possess extremely good impact resistance.
    Type: Grant
    Filed: June 22, 1984
    Date of Patent: May 13, 1986
    Assignee: Shell Oil Company
    Inventor: J. Douglas McCullough, Jr.
  • High flow propylene polymer compositions
    Patent number: 4535125
    Abstract: Visbroken blends of sequentially polymerized ethylene-propylene copolymers and linear low density polyethylene possess extremely good impact resistance along with high melt flows without excessive loss of stiffness.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: August 13, 1985
    Assignee: Shell Oil Company
    Inventor: J. Douglas McCullough, Jr.
  • High toughness propylene polymer compositions
    Patent number: 4508872
    Abstract: Blends of sequentially polymerized ethylene-propylene copolymers, high density ethylene homopolymers, and linear low density polyethylene subjected to peroxide-contacting possess extremely good impact resistance along with high melt flows without excessive loss of stiffness.
    Type: Grant
    Filed: February 22, 1984
    Date of Patent: April 2, 1985
    Assignee: Shell Oil Company
    Inventor: J. Douglas McCullough, Jr.
  • High notched impact toughness propylene polymer compositions
    Patent number: 4493923
    Abstract: Blends of sequentially polymerized ethylene-propylene copolymers, high density ethylene homopolymers, EPM or EPDM rubber and linear low density polyethylene subjected to peroxide-contacting possess extremely good impact resistance along with high melt flows without excessive loss of stiffness.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: January 15, 1985
    Assignee: Shell Oil Company
    Inventor: J. Douglas McCullough, Jr.
  • 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