Patents by Inventor Douglas Leon Simms

Douglas Leon Simms 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).

  • Patterned chromate film process
    Patent number: 4077851
    Abstract: A process is described for putting down patterned chromate films on metal substrates. The procedure involves first forming a chromate film on the metal surface and then forming the patterned chromate film. The pattern is formed by sputtering the substrate through a suitable shadow mask. This procedure yields patterned chromate films with high dimensional tolerance limits. Such patterns are particularly useful in the fabrication of electronic artifacts, as for example, a mask in gold plating processes.
    Type: Grant
    Filed: March 4, 1977
    Date of Patent: March 7, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Douglas Leon Simms, Peter Kenny Skurkiss, Clark Woody White