Patents by Inventor Gregory J. Lestina

Gregory J. Lestina 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).

  • Photographic material and process employing a development inhibitor releasing compound containing a fluorinated carbon alpha to an amide group
    Patent number: 5283163
    Abstract: A photographic development inhibitor releasing compound comprises a releasable development inhibitor group comprising an amide group containing a carbon alpha to the amide functionality which is di- or tri-fluorinated. Such a compound is useful in photographic silver halide materials and processes to enable increased image sharpness and good interimage results.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: February 1, 1994
    Assignee: Eastman Kodak Company
    Inventors: Gregory J. Lestina, David T. Southby, Wojciech Slusarek, David A. Steele, Teh-Hsuan Chen
  • Photographic elements containing removable couplers
    Patent number: 5118594
    Abstract: This invention relates to novel photographic dye-forming coupler compounds which are non-diffusible as incorporated in a photographic element, but which, during processing, are converted to a form which is removable from the element if the coupler compound has not reacted with oxidized silver halide color developing agent.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: June 2, 1992
    Assignee: Eastman Kodak Company
    Inventors: Gregory J. Lestina, Jon D. Bass, John W. Harder, Stephen P. Singer
  • Photographic elements containing removable couplers
    Patent number: 5051343
    Abstract: This invention relates to novel photographic dye-forming coupler compounds which are non-diffusible as incorporated in a photographic element, but which, during processing, are converted to a form which is removable from the element if the coupler compound has not reacted with oxidized silver halide color developing agent.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: September 24, 1991
    Assignee: Eastman Kodak Company
    Inventors: Gregory J. Lestina, Jon D. Bass, John W. Harder, Stephen P. Singer
  • Nondiffusible photographic couplers and photographic elements and processes employing same
    Patent number: 4443536
    Abstract: Photographic couplers comprising a coupler moiety and a ballast moiety have advantageous properties when the ballast moiety is terminated with a hydroxyphenylsulfonyl or hydroxyphenylsulfinyl group. The couplers are useful in photographic emulsions and element.
    Type: Grant
    Filed: April 8, 1982
    Date of Patent: April 17, 1984
    Assignee: Eastman Kodak Company
    Inventor: Gregory J. Lestina
  • Shifted photographic dyes and compositions, elements and processes employing them
    Patent number: 4234672
    Abstract: Shifted photographic dyes which have good storage stability, yet rapidly unblock under processing conditions contain a blocked hydroxy group and a neighboring group that anchimerically assists the hydrolytic cleavage of the blocking group under processing conditions.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: November 18, 1980
    Assignee: Eastman Kodak Company
    Inventors: John A. Ford, Gregory J. Lestina
  • Shifted photographic dyes and compositions, elements and processes employing them
    Patent number: T999003
    Abstract: Shifted photographic dyes which have good storage stability, yet rapidly unblock under processing conditions contain a blocked hydroxy group and a neighboring group that anchimerically assists the hydrolytic cleavage of the blocking group under processing conditions.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: October 7, 1980
    Inventors: John A. Ford, Gregory J. Lestina
  • Nondiffusible photographic couplers and photographic elements and processes employing same
    Patent number: T105702
    Abstract: Photographic couplers comprising a coupler moiety and a ballast moiety have advantageous properties when the ballast moiety is terminated with a hydroxyphenylsulfonyl or hydroxyphenylsulfinyl group. The couplers are useful in photographic emulsions and element.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: August 6, 1985
    Inventor: Gregory J. Lestina