Patents by Inventor Leonard Stein

Leonard Stein 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).

  • Selective etching of polymeric materials embodying silicones via reactor plasmas
    Patent number: 4209356
    Abstract: Silicon is employed as a masking material for the selective plasma chemical etching of a coating material of a polyimide-silicone copolymer disposed on selective surface areas of electronic devices.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: June 24, 1980
    Assignee: General Electric Company
    Inventor: Leonard Stein
  • Process for selective etching of polymeric materials embodying silicones therein
    Patent number: 4140572
    Abstract: Titanium is employed as a masking material for the selective etching of a coating material of a polyimide-silicone copolymer disposed on selective surface areas of electronic devices.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: February 20, 1979
    Assignee: General Electric Company
    Inventor: Leonard Stein