Patents by Inventor Henry John Schwalenstocker, Jr.

Henry John Schwalenstocker, Jr. 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).

  • Silver halide emulsion sensitized with a fused diazepine
    Patent number: 4036649
    Abstract: Photographic silver halide emulsions which have their sensitivity increased by the addition of a fused diazepine.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: July 19, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Henry John Schwalenstocker, Jr.