Patents by Inventor Roger J. Eldred

Roger J. Eldred 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).

  • Radiation cured and monomer modified silicon elastomers
    Patent number: 4158617
    Abstract: In accordance with a preferred embodiment of this invention, a tear resistant silicone elastomer, which has improved elongation properties, is produced. This elastomer is the radiation induced reaction product of a noncured methyl vinyl silicone resin (VMQ) and uniformly dispersed therein a blend of a polyfunctional acrylic crosslinking monomer and a filler.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: June 19, 1979
    Assignee: General Motors Corporation
    Inventor: Roger J. Eldred
  • Ethylene-propylene elastomers and ethylene-propylene-diene elastomers with improved heat and oil resistance
    Patent number: 4066590
    Abstract: In an exemplary embodiment a high temperature and oil resistant elastomer composition includes the peroxide-induced reaction product of, by weight, 100 parts ethylene-propylene-diene rubber, about 20 parts of a suitable crosslinking monomer, about 8 parts of a chlorinated organic material such as Chlorowax LV, about 10 parts of a suitable hindered phenolic antioxidant 10 to 15 parts zinc oxide and 5 to 8 parts magnesium oxide. The elastomer formulation may optionally contain suitable reinforcing and/or semireinforcing fillers and processing oils. A similar ethylene-propylene rubber formulation may be prepared. The resulting elastomer formulations have remarkable oil resistance and retain a significant elongation even after aging at 177.degree. C. (350.degree. F.) for 168 hours.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: January 3, 1978
    Assignee: General Motors Corporation
    Inventors: Roger J. Eldred, Stanley A. Iobst, Ismat A. Abu-Isa
  • Oil-resistant EPDM elastomer
    Patent number: 3988227
    Abstract: In accordance with a preferred embodiment of this invention, a high temperature oil resistant ethylene-propylene-diene monomer (hereinafter EPDM) elastomer is produced. This product is basically the high energy radiation induced reaction product of, by weight, about 100 parts of an uncured conventional EPDM elastomer, from 15 to 25 parts of trimethylolpropanetrimethacrylate (hereinafter TMPT), from 15 to 80 parts of a reinforcing filler and from 0 to 40 parts of an extender oil.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: October 26, 1976
    Assignee: General Motors Corporation
    Inventor: Roger J. Eldred
  • Radiation cured acrylonitrile-butadiene elastomers
    Patent number: 3950238
    Abstract: In accordance with a preferred embodiment of this invention, the ultimate elongation of an electron beam radiation cured acrylonitrile-butadiene elastomer is significantly increased by the incorporation of a preferred noncrosslinking monomer, glycidyl methacrylate, in combination with the conventional crosslinking monomer, trimethylolpropanetrimethacrylate, prior to the radiation curing process.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: April 13, 1976
    Assignee: General Motors Corporation
    Inventor: Roger J. Eldred