Patents by Inventor Lyman Lyle Holland

Lyman Lyle Holland 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).

  • Large denier polyethylene terephthalate monofilaments having good transverse properties
    Patent number: 3963678
    Abstract: Polyester monofilaments of 1000 to 10,000 denier per filament can be produced to have both good straight tenacity and good transverse properties (high loop tenacity) by extruding molten polyethylene terephthalate of at least 0.6 intrinsic viscosity through an air gap into a water bath to form a monofil and then drawing the monofil in two stages under controlled heating conditions to provide at least 0.190 average birefringence, measured along monofil diameters and a substantially lower birefringence value adjacent to the surface of the monofil. The monofilaments are suitable for use as reinforcement in tires, V-belts and other industrial applications.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: June 15, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Roddy Merl Conrad, Lyman Lyle Holland