Patents by Inventor Elbert Du

Elbert Du 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).

  • Pressure sensitive transfer media
    Patent number: 4211826
    Abstract: Pressure sensitive image transfer media in the form of a thin film substance having a thin layer thereon comprising the solvent evaporated residue of a liquid mixture made up of substantially equal amounts of ethyl hydroxyl ethyl cellulose and a second resin incompatible therewith in association with a solvent immiscible vehicle modifier of a character incompatible with both of said polymers.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: July 8, 1980
    Inventor: Elbert Du
  • Pressure sensitive magnetic image transfer media
    Patent number: 4132835
    Abstract: Pressure sensitive magnetic image transfer media in the form of a thin film substrate having a thin layer of solvent evaporated residue of a liquid mixture incorporating substantially equal dispersed amounts of polyethylene homopolymer and magnetically sensible material with small amounts of mutually incompatible dissolved acrylic film forming resin material and ethyl hydroxyl ethyl cellulose.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: January 2, 1979
    Assignee: Frye Copysystems, Inc.
    Inventor: Elbert Du