Patents by Inventor Thomas J. Doran, Jr.

Thomas J. Doran, Jr. 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 additive of silica and organic coupling agent
    Patent number: 3994742
    Abstract: Abrasion-resistant vulcanized rubber compositions which are also resistant to heat build-up are provided which are useful as tire treads and subtreads for vehicles, e.g., automobiles. The compounds comprise the vulcanizate of a rubber polymer, a finely-divided reinforcing siliceous pigment, and an organic coupling agent having at least one nitrogen functional group that bonds to the siliceous pigment and at least one sulfur functional group that bonds to the rubber polymer.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: November 30, 1976
    Assignee: PPG Industries, Inc.
    Inventors: David B. Russell, Thomas J. Doran, Jr.
  • Siliceous pigment composition
    Patent number: 3953223
    Abstract: Abrasion-resistant vulcanizates are provided comprising a rubber, a finely-divided reinforcing siliceous pigment, a compound having a plurality of reactive amino groups, an aromatic hydroxy compound, and a methylene donor. Rubber additives are provided comprising a finely-divided siliceous pigment having adsorbed thereon at least one but not more than two of the group selected from a compound having a plurality of reactive amino groups, an aromatic hydroxy compound, and a methylene donor.
    Type: Grant
    Filed: April 5, 1974
    Date of Patent: April 27, 1976
    Assignee: PPG Industries, Inc.
    Inventors: Thomas J. Doran, Jr., Henry C. Stevens