Patents by Inventor Charles R. Wilder

Charles R. Wilder 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).

  • Polyethylene terephthalate molding resin blends
    Patent number: 5047450
    Abstract: Glass fiber reinforced polyethylene terephthalate molding resin blends are provided which crystallize rapidly after being injection molded and which have engineering resin performance characteristics. In addition to polyethylene terephthalate and glass fibers, the blends contain an aliphatic polyester, an ionic hydrocarbon polymer, an antioxidant, and, optionally, polythylene and/or a polymeric epoxy compound. The blends can be flame retarded with a brominated polystyrene and an antimonate without substantial loss of, or change in, properties.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: September 10, 1991
    Assignee: Phillips Petroleum Company
    Inventor: Charles R. Wilder
  • Rapidly crystallizing polyethylene terephthalate blends
    Patent number: 5041476
    Abstract: Resin compositions of polyethylene terephthalate, aliphatic polyester and, optionally, filler are provided which have rapid crystallization, broad crystallizing temperature range, and high heat distortion temperatures when molded.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: August 20, 1991
    Assignee: Phillips Petroleum Company
    Inventor: Charles R. Wilder
  • Rapidly crystallizing polyethylene terephthalate blends
    Patent number: 5030680
    Abstract: There are provided compositions comprising polyethylene terephthalate and aliphatic polyester with varying combinations of fillers. Molded samples made with these compositions variously have low warpage, good colorability, or economic advantages while retaining other good physical and mechanical properties. One group of compositions exhibits good spiral glow properties and is thus suitable for encapsulation of electronic circuitry.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: July 9, 1991
    Assignee: Phillips Petroleum Company
    Inventors: Charles R. Wilder, Howard F. Efner
  • Novel carbon black and process for preparing same
    Patent number: 4631304
    Abstract: Carbon black which has been treated with organic peroxides imparts high scorch resistance to rubber into which it has been compounded.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: December 23, 1986
    Assignee: Phillips Petroleum Company
    Inventor: Charles R. Wilder
  • Carbon black and process for preparing same
    Patent number: 4518434
    Abstract: Carbon black which has been treated with organic peroxides imparts high scorch resistance to rubber into which it has been compounded.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: May 21, 1985
    Assignee: Phillips Petroleum Company
    Inventor: Charles R. Wilder