Patents by Inventor Kenneth R. Lea

Kenneth R. Lea 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).

  • Polyurethane fiber uniformity
    Patent number: 3966866
    Abstract: A particular elastomeric polyurethane polymer is heated to about 225.degree.C. to ensure complete melting prior to extrusion side-by-side with a molten hard polymer. The polyurethane polymer is made from an aromatic diisocyanate, a high molecular weight (800-3000) diol and a low molecular weight (500 or less) diol, combined in specific ratio ranges.
    Type: Grant
    Filed: July 15, 1974
    Date of Patent: June 29, 1976
    Assignee: Monsanto Company
    Inventors: Richard L. Ballman, Kenneth R. Lea, Walter J. Nunning, John H. Southern