Patents by Inventor Roslyn E. Kramer

Roslyn E. Kramer 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 of visually detecting antioxidant in an organic mixture
    Patent number: 4257776
    Abstract: Method of screening a mixture of organic compounds to detect the presence of an antioxidant material wherein the organic mixture is first chromatographically separated on a polyamide coated plate and then coated with linoleic acid. The plate is heated until the linoleic acid oxidation products react with the free amine groups on the polyamide material to produce a color change. Antioxidant compounds separated on the plate inhibit the color change and can be visually detected.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: March 24, 1981
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: William L. Porter, Roslyn E. Kramer