Patents by Inventor Robert Charles Hirst

Robert Charles Hirst 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).

  • Rubber compositions containing a trivalent phosphorous compound-silica complex
    Patent number: 6441070
    Abstract: The present invention relates to rubber compositions containing an elastomer and a trivalent phosphorous compound-silica complex.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: August 27, 2002
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Adel Farhan Halasa, David John Zanzig, Robert Charles Hirst
  • Preparation of sulfur-containing organosilicon compounds
    Patent number: 5663396
    Abstract: The present invention relates to a process for the production of organosilicon compounds of the formulaZ--Alk--S.sub.n --Alk--Z (I)in which Z is selected from the group consisting of ##STR1## where R.sup.1 is an alkyl group of 1 to 4 carbon atoms, cyclohexyl or phenyl;R.sup.2 is alkoxy of 1 to 8 carbon atoms, or cycloalkoxy of 5 to 8 carbon atoms;Alk is a divalent hydrocarbon of 1 to 18 carbon atoms and n is an integer of 2 to 8; comprising(A) reacting sodium hydroxide with sulfur in the presence of a saturated NaCl aqueous solution to form a reaction mixture;(B) reacting said reaction mixture with a compound of the formula:Z--Alk--X (II)where X is Cl or Br; in the presence of a phase transfer catalyst.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: September 2, 1997
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Richard Thomas Musleve, Dane Kenton Parker, Robert Charles Hirst