Patents by Inventor Claude F. Gerbal

Claude F. Gerbal 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).

  • Substituted sulfonamido compounds, photosensitive elements, film units, and processes for retaining a photographic image with same
    Patent number: 4605697
    Abstract: A nondiffusible sulfonamido compound which is alkali-cleavable upon oxidation to release a diffusible photographically useful material, said nondiffusible sulfonamido compound having the formula: ##STR1## wherein: (a) R.sup.1 is alkyl, aryl sulfamyl, carbamyl, carbonamido, carbonyl, carbonyloxy or sulfonamido;(b) R.sup.2 is alkyl having from 1 to 18 carbon atoms, aryl, or alkylphenyl having from 7 to 12 carbon atoms;(c) R.sup.3 and R.sup.4 are independently alkyl, or aryl, or R.sup.3 and R.sup.4, taken together, form a fused carbocyclic or heterocyclic ring;(d) NHSO.sub.2 PUG represents a sulfonamido group;(e) PUG represents a photographically useful group; and(f) at least one of R.sup.1, R.sup.2, R.sup.3, or R.sup.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: August 12, 1986
    Assignee: Eastman Kodak Company
    Inventors: Claude F. Gerbal, Thomas E. Gompf, Pierre D. Collet
  • Substituted sulfonamido compounds, photosensitive elements, film units, and processes for retaining a photographic image with same
    Patent number: 4258120
    Abstract: A nondiffusible sulfonamido compound which is alkali-cleavable upon oxidation to release a diffusible photographically useful material, said nondiffusible sulfonamido compound having the formula: ##STR1## wherein: (a) R.sup.1 is alkyl, aryl sulfamyl, carbamyl, carbonamido, carbonyl, carbonyloxy or sulfonamido;(b) R.sup.2 is alkyl having from 1 to 18 carbon atoms, aryl, or alkylphenyl having from 7 to 12 carbon atoms;(c) R.sup.3 and R.sup.4 are independently alkyl, or aryl, or R.sup.3 and R.sup.4, taken together, form a fused carbocyclic or heterocyclic ring;(d) NHSO.sub.2 PUG represents a sulfonamido group;(e) PUG represents a photographically useful group; and(f) at least one of R.sup.1, R.sup.2, R.sup.3, or R.sup.
    Type: Grant
    Filed: April 24, 1979
    Date of Patent: March 24, 1981
    Assignee: Eastman Kodak Company
    Inventors: Claude F. Gerbal, Thomas E. Gompf, Pierre D. Collet