Patents by Inventor Samuel J. Ciurca, Jr.

Samuel J. Ciurca, Jr. 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).

  • Patent number: 4178183
    Abstract: Ballasted 1-hydroxy-2-naphthamide couplers which are N-substituted with a thiazolyl group that is in turn substituted with a phenyl group are disclosed as well as compositions and photographic elements containing these couplers in coupler solvents. The coupler solvent particles are comprised of a combination of a coupler solvent and the coupler capable of permitting the formation of a microcrystalline dye. Surprisingly these microcrystalline dyes exhibit a broadened absorption characteristic in the 750 to 850 nm region of the spectrum. Dye images having such absorption characteristics are particularly suited to forming integral infrared absorbing sound tracks in photographic elements, such as motion picture projection films.
    Type: Grant
    Filed: July 27, 1978
    Date of Patent: December 11, 1979
    Assignee: Eastman Kodak Company
    Inventors: Samuel J. Ciurca, Jr., Robert G. Cameron, Edward J. Walsh
  • Patent number: 4126461
    Abstract: Photographic elements for providing black-and-white images contain a silver halide emulsion having associated therewith a non-diffusible resorcinol coupler and a color developing agent or a precursor of a color developing agent. The elements can be processed by simple alkaline activation. Since image density is derived at least in part from the resorcinol coupler, lower silver halide coverages can be employed or the silver can be recovered, or both.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: November 21, 1978
    Assignee: Eastman Kodak Company
    Inventors: David A. Pupo, Samuel J. Ciurca, Jr., Grant M. Haist, James R. King
  • Patent number: 4124398
    Abstract: Disclosed herein are aqueous and nonaqueous photographic bleaching solutions and radiation sensitive elements comprising a thiyl bleaching agent precursor having the formula ##STR1## wherein Z comprises the nonmetallic atoms necessary to complete a 5 to 7 member heterocyclic ring; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are independently selected from the group consisting of alkyl, cycloalkyl, aralkyl, aryl or R.sup.2 and R.sup.3 or R.sup.4 and R.sup.5 can be taken together with the carbon atom of the ring to which they are attached to form a cycloalkyl or cycloalkenyl group; and R.sup.1 is independently selected from the group consisting of hydrogen, oxo and a complexing ligand for silver (I) ion wherein the Ksp of the complexed product of the ligand and silver (I) ion is less than about 10.sup.-12 at 25.degree. C. The thiyl bleaching agents disclosed herein are capable of bleaching preformed or predeveloped metals such as silver in both aqueous and nonaqueous photographic materials.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: November 7, 1978
    Assignee: Eastman Kodak Company
    Inventors: Samuel J. Ciurca, Jr., Carl F. Kohrt
  • Patent number: 4088488
    Abstract: Stable nitroxyl radicals are useful as oxidants in photographic elements or film units.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: May 9, 1978
    Assignee: Eastman Kodak Company
    Inventors: Jack C. Chang, Peter A. Marr, Samuel J. Ciurca, Jr.
  • Patent number: T998014
    Abstract: Ballasted 1-hydroxy-2-naphthamide couplers which are N-substituted with a thiazolyl group that is in turn substituted with a phenyl group are disclosed as well as compositions and photographic elements containing these couplers in coupler solvents. Preferred couplers are those of the formula ##STR1## wherein R is a coupling-off group and Ballast is a hydrophobic photographic ballasting group. The coupler solvent particles are comprised of a combination of a coupler solvent and the coupler capable of permitting the formation of a microcrystalline dye. Surprisingly these microcrystalline dyes exhibit a broadened absorption characteristic in the 750 to 850 nm region of the spectrum. Dye images having such absorption characteristics are particularly suited to forming integral infrared absorbing sound tracks in photographic elements, such as motion picture projection films.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: September 2, 1980
    Assignee: Eastman Kodak Company
    Inventors: Samuel J. Ciurca, Jr., Robert G. Cameron, Edward J. Walsh