Patents by Inventor Warren Lee Tomek

Warren Lee Tomek 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).

  • Polyamidation process
    Patent number: 3947424
    Abstract: In a process for the preparation of fiber-forming polyamides in the presence of a phenylphosphinate where copper from a cupric salt employed in the process tends to precipitate from the system, such copper loss is substantially reduced by using a mol ratio of KBr:KI of greater than 0.33 with 0.7 to 9 mols KI at a total potassium halide concentration of from 7.5 to 26 mols per million grams of polymer.
    Type: Grant
    Filed: July 31, 1974
    Date of Patent: March 30, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Warren Lee Tomek