Patents by Inventor Arthur I. Holden

Arthur I. Holden 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).

  • Artificial gelatins of high methionine content for photographic film
    Patent number: 4315072
    Abstract: Artificial gelatins containing higher proportions of methionine than are found in natural gelatin are made by thermal polymerization of methionine with various proportions of other .alpha.-amino acids, including some proportion of aspartic acid, glutamic acid or lysine. Artificial gelatins containing as much as 40 mole percent methionine can be obtained. Proportions in the polymer can be adjusted by control of proportions in the reaction mixture. Photographic silver halide emulsions containing these artificial gelatins and photographic films employing the emulsions are also disclosed.
    Type: Grant
    Filed: March 11, 1980
    Date of Patent: February 9, 1982
    Assignee: Polymicro
    Inventors: Sidney W. Fox, Arthur I. Holden