Patents by Inventor Assunta Anna Pritchard

Assunta Anna Pritchard 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).

  • Polishing of CdS crystals
    Patent number: 4108716
    Abstract: A process for polishing both the cadmium and sulfur face of CdS using buffered HCl solutions has been found to produce very smooth crystal surfaces. Use of HCl solutions buffered to a pH between 2.2 and 2.8 to polish the cadmium face is quite effective. An equally effective polishing agent for the sulfur face is a HCl solution buffered to a pH between 0.7 and 1.3.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: August 22, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Assunta Anna Pritchard, Sigurd Wagner