Patents by Inventor Erving A. Leonard, Jr.

Erving A. Leonard, 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).

  • Embossed thermoplastic material
    Patent number: 4343848
    Abstract: An embossed thermoplastic film characterized in that one surface of the film is provided with a plurality of rows of protuberances having the shape of pyramids with square bases which extend perpendicular to both the longitudinal and the transverse axes of the film. The protuberances are joined at the edge of the bases by flat valley portions which intersect each other at right angles. The embossed film has a low coefficient of friction and increased embossed thickness.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: August 10, 1982
    Assignee: Ethyl Corporation
    Inventor: Erving A. Leonard, Jr.