Patents by Inventor Jean B. Rogers

Jean B. Rogers 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).

  • Synthesis of amino hydroxy cyclopentenones
    Patent number: 4304934
    Abstract: This invention relates to a method of synthesizing 3-amino-2-hydroxy-2-cyclopentenones possessing an aliphatic substituent in the 4-position which comprises reacting cyanoacetamide with an aliphatic aldehyde to yield the corresponding .beta.-substituted-.alpha.,.alpha.'-dicyanoglutaramide, hydrolyzing the amide to the corresponding .beta.
    Type: Grant
    Filed: December 30, 1980
    Date of Patent: December 8, 1981
    Assignee: Polaroid Corporation
    Inventors: James R. Bartels-Keith, Eva R. Karger, Jean B. Rogers
  • 1-Nitroso-1,2,3,4-tetrahydroquinoline and 1-nitroso-indoline compounds
    Patent number: 4067871
    Abstract: This invention relates to N-nitroso compounds having the formula ##STR1## wherein R and R' each are selected from hydrogen and alkyl, Z is --CN or --COOR" wherein R" is alkyl and n is a positive integer from 1 to 7. These compounds are useful as intermediates in the preparation of photographic silver halide developing agents.
    Type: Grant
    Filed: September 9, 1976
    Date of Patent: January 10, 1978
    Assignee: Polaroid Corporation
    Inventors: James R. Bartles-Keith, Mary T. Burgess, Jean B. Rogers