Patents by Inventor Ieuan Thomas

Ieuan Thomas 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).

  • Catalytic preparation of polyamides from bis(aminophenyl)sulphone
    Patent number: 3960819
    Abstract: Melt polycondensation of bis(aminophenyl)sulphone with dicarboxylic acid, especially aliphatic dicarboxylic acid, using as catalyst a specified Group VB compound, or metal salt or complex thereof. Typical catalysts are phosphinates or phosphonates in admixtures with metal salts.
    Type: Grant
    Filed: March 4, 1974
    Date of Patent: June 1, 1976
    Assignee: Imperial Chemical Industries, Inc.
    Inventors: Eileen Jones, Arthur Morris, Ieuan Thomas, James Rodney Traynor