Patents by Inventor Stephen C. Davies

Stephen C. Davies 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).

  • Chlorinated EPDM with superior stability
    Patent number: 5045603
    Abstract: A chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer having a chlorine content of from about 0.5 to 14 percent by weight characterized by superior viscosity stability on storage or exposure to elevated temperatures is obtained by chlorinating an ethylene-alpha olefin-nonconjugated diolefin terpolymer wherein said nonconjugated diolefin is an acyclic nonconjugated diolefin characterized in that one olefinic bond is monosubstituted and terminal and the other olefinic bond is trisubstituted. A vulcanizable rubber composition comprising said chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer and cure active agents is also provided.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: September 3, 1991
    Assignee: Polysar Limited
    Inventors: Stephen C. Davis, Janet B. Fulton, Peter P. M. Hoang
  • Chlorinated EPDM with superior stability
    Patent number: 5015696
    Abstract: A chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer having a chlorine content of from about 0.5 to 14 percent by weight characterized by superior viscosity stability on storage or exposure to elevated temperatures is obtained by chlorinating an ethylene-alpha olefin-nonconjugated diolefin terpolymer wherein said nonconjugated diolefin is a bridged ring nonconjugated diolefin characterized in that it is a 5-alkenyl-2-norbornene wherein the alkenyl group is a C.sub.5 to C.sub.12 hydrocarbon group with a trisubstituted olefinic bond that is not .alpha., .beta. to said 2-norbornene ring.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: May 14, 1991
    Inventors: Stephen C. Davis, Janet B. Fulton, Peter P. M. Hoang
  • Chlorinated EPDM with superior stability
    Patent number: 4959420
    Abstract: A chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer having a chlorine content of from about 0.5 to 14 percent by weight characterized by superior viscosity stability on storage or exposure to elevated temperatures is obtained by chlorinating an ethylene-alpha olefin-nonconjugated diolefin terpolymer wherein said nonconjugated diolefin is an acyclic nonconjugated diolefin characterized in that one olefinic bond is monosubstituted and terminal and the other olefinic bond is trisubstituted. A vulcanizable rubber composition comprising said chlorinated ethylene-alpha olefin-nonconjugated diolefin terpolymer and cure active agents is also provided.
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: September 25, 1990
    Assignee: Polysar Limited
    Inventors: Stephen C. Davis, Janet B. Fulton, Peter P. M. Hoang
  • Copper bath for electroless plating having excess counter-cation and process using same
    Patent number: 4762601
    Abstract: An electroless copper plating bath is improved so as to facilitate its regeneration in an electrodialysis cell. The bath includes elevated amounts of an added salt, preferably as Na salt. The elevated sodium ion level serves as additional counter-cation to hydroxyl ion which is produced at the cathode of the electrodialysis cell. The excess anion from the added salt increases the rate of out-migration of by-products, such as formate ions and sulfate ions, relative to hydroxyl ions through an anion permselective membrane.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: August 9, 1988
    Assignee: Morton Thiokol, Inc.
    Inventors: Gerald Krulik, Stephen C. Davis, John B. Davison