Patents by Inventor Parul V. Purohit

Parul V. Purohit 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 preparing laminates of ZnSe and ZnS
    Patent number: 4978577
    Abstract: An improved method of forming a ZnS layer on a ZnSe substrate by chemical vapor deposition of ZnS onto the ZnSe is disclosed in which the ZnS is contacted, prior to the chemical vapor deposition of the ZnS, with H.sub.2 S in the absence of zinc metal vapor to cause reaction of the H.sub.2 S and the surface of the ZnSe substrate.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: December 18, 1990
    Assignee: CVD Incorporated
    Inventors: Parul V. Purohit, Jeffery L. Kirsch, James C. MacDonald