Patents by Inventor Leslie W. Gulrich, Jr.

Leslie W. Gulrich, 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).

  • Aramid spinning process
    Patent number: 4466935
    Abstract: In a dry-spinneret wet-spinning process for the preparation of para-aramid filaments by spinning from sulfuric acid solution, filament tenacity and modulus are increased when the tension is applied to the freshly spun, wet filaments when they contain less than 50% sulfuric acid.
    Type: Grant
    Filed: April 22, 1983
    Date of Patent: August 21, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas I. Bair, Leslie W. Gulrich, Jr.