Patents by Inventor Robert D. Engelken

Robert D. Engelken 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).

  • Method for electroless and vapor deposition of thin films of three tin sulfide phases on conductive and nonconductive substrates
    Patent number: 4681777
    Abstract: The present invention relates to a method for electroless and vapor deposition of thin films of one, two and/or three semiconducting tin sulfide phases (SnS, Sn.sub.2 S.sub.3, and/or SnS.sub.2) by below-solution electroless plating and/or above-solution self-induced chemical vapor deposition onto both nonconductive and conductive substrates from a chemical bath containing an organic acid, Sn(II) salt, elemental yellow sulfur and water.
    Type: Grant
    Filed: May 5, 1986
    Date of Patent: July 21, 1987
    Inventors: Robert D. Engelken, Hal E. McCloud