Patents by Inventor Robert G. Cameron

Robert G. Cameron 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: 6162598
    Abstract: A color photographic element includes a support, a silver halide emulsion layer, and associated therewith a yellow dye-forming coupler having the formula ##STR1## wherein R.sup.1 represents a tertiary alkyl group containing 4 to about 20 carbon atoms; R.sup.2 represents an alkyl, aryl, or heterocyclic group; X represents hydrogen or a substituent; Y and Z each independently represent a group consisting of those substituents having a Hammett sigma.sub.para constant greater than zero; and m and n is each 1 to 4.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: December 19, 2000
    Assignee: Eastman Kodak Company
    Inventors: Ping-Wah Tang, Robert G. Cameron
  • Patent number: 4250251
    Abstract: Ballasted primary and secondary 3'-sulfamoyl-1-hydroxy-2-naphthanilide couplers are disclosed as well as compositions and photographic elements containing these couplers in coupler solvent particles. 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 11, 1979
    Date of Patent: February 10, 1981
    Assignee: Eastman Kodak Company
    Inventors: Harland J. Osborn, Robert G. Cameron, Edward J. Walsh
  • Patent number: 4233389
    Abstract: Fluorinated 1-hydroxy-2-naphthamide couplers which are N-substituted with a lower alkylphenoxybutyl ballasting group are disclosed as well as compositions and photographic elements containing these couplers in coupler solvent particles. 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 23, 1979
    Date of Patent: November 11, 1980
    Assignee: Eastman Kodak Company
    Inventors: Jose M. Fernandez, Robert G. Cameron, Edward J. Walsh
  • 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: 3933501
    Abstract: Color photographic elements containing silver halide and incorporated color-forming materials are described. These elements contain at least two differentially light-sensitive emulsion layers, the overlying layer being sensitive to the relatively shorter wavelengths and containing at least one yellow dye-forming color coupler which has the unusual ability to inhibit the reaction of competing couplers (such as citrazinic acid, for example) when competing couplers are used in color developing solutions in the conventional manner. Use of these couplers in the overlying (color) layer of multi-layer color photographic elements makes it possible to produce colored images having improved graininess.Couplers having this unusual capability are selected from those having the structures: ##SPC1##Wherein R.sub.1, R.sub.2 and R.sub.3 are as defined herein.
    Type: Grant
    Filed: June 10, 1974
    Date of Patent: January 20, 1976
    Assignee: Eastman Kodak Company
    Inventors: Robert G. Cameron, Dan Neuberger
  • Patent number: D250354
    Type: Grant
    Filed: September 29, 1977
    Date of Patent: November 21, 1978
    Inventor: Robert G. Cameron, Jr.
  • Patent number: T990004
    Abstract: 5,6,7,8 Tetrafluoro 1-hydroxy-2-naphthamide couplers which are N-substituted with a lower alkylphenoxybutyl ballasting group are disclosed as well as compositions and photographic elements containing these couplers in coupler solvent particles. 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: May 4, 1979
    Date of Patent: January 1, 1980
    Inventors: Jose M. Fernandez, Robert G. Cameron, Edward J. Walsh
  • Patent number: RE30211
    Abstract: Color photographic elements containing silver halide and incorporated color-forming materials are described. These elements contain at least two differentially light-sensitive emulsion layers, the overlying layer being sensitive to the relatively shorter wavelengths and containing at least one yellow dye-forming color coupler which has the unusual ability to inhibit the reaction of competing couplers (such as citrazinic acid, for example) when competing couplers are used in color developing solutions in the conventional manner. Use of these couplers in the overlying (color) layer of multi-layer color photographic elements makes it possible to produce colored images having improved graininess.Couplers having this unusual capability are selected from those having the .[.structures.]. .Iadd.structure .Iaddend. ##STR1## wherein R.sub.1, .Iadd.and .Iaddend.R.sub.2 .[.and R.sub.3 .]. are as defined herein.
    Type: Grant
    Filed: June 16, 1978
    Date of Patent: February 12, 1980
    Assignee: Eastman Kodak Company
    Inventors: Robert G. Cameron, Dan Neuberger
  • Patent number: T998007
    Abstract: Ballasted primary and secondary 3'-sulfamoyl-1-hydroxy-2-naphthanilide couplers are disclosed as well as compositions and photographic elements containing these couplers in coupler solvent particles. 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 mm 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: December 14, 1979
    Date of Patent: September 2, 1980
    Inventors: Harland J. Osborn, Robert G. Cameron, Edward J. Walsh
  • 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