Patents by Inventor Henry A. Kessler

Henry A. Kessler 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).

  • Bondable agar dental impression material
    Patent number: 4242239
    Abstract: A heavy bodied reversible hydrocolloid dental impression material is disclosed. This material comprises agar-agar as the main component in which there is added a small amount of locust bean gum, potassium or zinc sulfate, a borate and nonionic poly(ethyleneoxide)homopolymer. This dental impression material is effective, for example, for bonding to an alginate material.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: December 30, 1980
    Assignee: Warner-Lambert
    Inventors: Henry A. Kessler, Richard A. McEvoy
  • Cure material from liquid polythiopolymercaptan polymers for dental impression taking
    Patent number: 4082693
    Abstract: The present invention is concerned with improved dental semi-solid or paste-like elastomeric materials which have the capability of precise surface detail reproduction at ambient and body temperature. Such materials are prepared by treating liquid polysulfide with a synergistic accelerator system comprising a metallic peroxide, e.g., zinc peroxide, 2,2' dithiobisbenzothiazole and 2-mercaptobenzothiazole.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: April 4, 1978
    Assignee: Warner-Lambert Company
    Inventors: Henry A. Kessler, Phyllis Ying