Patents by Inventor Ruskin Longworth

Ruskin Longworth 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).

  • Preparation of shaped articles of poly(metaphenylene isophthalamide)
    Patent number: 4283361
    Abstract: Process for the preparation of shaped articles of poly(metaphenylene isophthalamide) by simultaneously heating poly(metaphenylene isophthalamide) and applying moderately elevated pressures.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: August 11, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ruskin Longworth