Patents by Inventor Ronald M. Shewchuk

Ronald M. Shewchuk 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).

  • Polymers derived from polymerizable urethane vinyl esters
    Patent number: 5340894
    Abstract: A vinyl polymerizable reaction product useful in preparing pigment grind vehicles having improved grind time, viscosity properties and color properties is disclosed. The reaction product can be prepared by reaction of an ester with isopropenyl-.alpha.,.alpha.-dimethylbenzylisocyanate. The resulting product is a urethane ester which can be homopolymerized or copolymerized with other vinyl monomers. The invention is also directed toward the resulting polymeric grind vehicle and pigment pastes made therewith.
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: August 23, 1994
    Assignee: PPG Industries, Inc.
    Inventors: Shanti Swarup, Gregory J. McCollum, Ronald M. Shewchuk, Jonathan T. Martz
  • Polymerizable urethane ester vinyl reaction product
    Patent number: 5237090
    Abstract: A vinyl polymerizable reaction product useful in preparing pigment grind vehicles having improved grind time, viscosity properties and color properties is disclosed. The reaction product can be prepared by reaction of an ester with isopropenyl-.alpha.,.alpha.-dimethylbenzylisocyanate. The resulting product is a urethane ester which can be homopolymerized or copolymerized with other vinyl monomers. The invention is also directed toward the resulting polymeric grind vehicle and pigment pastes made therewith.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: August 17, 1993
    Assignee: PPG Industries, Inc.
    Inventors: Shanti Swarup, Gregory J. McCollum, Ronald M. Shewchuk, Jonathan T. Martz