Patents by Inventor Richard Lee Parton

Richard Lee Parton 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: 6120982
    Abstract: A silver halide photographic material comprises a red sensitive layer which contains a high chloride emulsion sensitized with at least two red sensitizing dyes. By adjusting the relative amounts of the two dyes the heat sensitivity of the red layer can be adjusted to match that of the blue sensitive and green sensitive layers to maintain color balance despite thermal fluctuations.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: September 19, 2000
    Assignee: Eastman Kodak Company
    Inventors: Richard Lee Parton, Paul Timothy Hahm
  • Patent number: 6066443
    Abstract: A photographic element having a silver halide emulsion spectrally sensitized to blue light by a dye of formula (I) to have a maximum blue sensitivity at less than 485 nm. The dye allows the element to have good color reproduction while still providing good speed response despite the shorter blue sensitivity. Formula (I) is: ##STR1## wherein: X and X' each independently represent the atoms necessary to complete a thiazole, benzothiazole, naphthothiazole, oxazole, benzoxazole, naphthoxazole, selenazole, benzoselenazole, naphthoselenazole, imidazole, benzimidazole, or naphtho-imidazole, and X may be further substituted and X' substituted or unsubstituted;Z.sub.1 represents a pyrrole, furan or thiophene containing group;R.sub.1 and R.sub.2 each independently represent substituted or unsubstituted hydrocarbon containing 1 to 10 carbon atoms; andA represents a counter-ion as needed to balance a charge of the molecule.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: May 23, 2000
    Assignee: Eastman Kodak Company
    Inventors: Thomas Robert Dobles, Richard Lee Parton, Pamela McCue Ferguson, Nona Veith Spitzner, David Alan Stegman, Steven George Link, Kenneth Joseph Reed, Marian Sue Henry
  • Patent number: 5925509
    Abstract: A silver halide photographic material having improved heat sensitivity comprises a red sensitive silver halide emulsion layer the silver halide of which is prepared in the presence of a hexacoordination complex of rhenium, ruthenium or osmium with at least four cyanide ligands and comprising at least about 90 mole percent silver chloride, wherein the emulsion contains at least one red sensitizing dye.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: July 20, 1999
    Assignee: Eastman Kodak Company
    Inventors: Richard Paul Garnsey, Pamela McCue Ferguson, Richard Lee Parton, Paul Timothy Hahm
  • Patent number: 5922525
    Abstract: A silver halide photographic material having improved heat sensitivity comprises a red sensitive silver halide emulsion layer the silver halide of which is prepared in the presence of a hexacoordination complex of rhenium, ruthenium or osmium with at least four cyanide ligands and comprising at least about 90 mole percent silver chloride, wherein the emulsion contains a thiosulfonate and a sulfinate or seleninate and at least one red sensitizing dye.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: July 13, 1999
    Assignee: Eastman Kodak Company
    Inventors: Richard Paul Garnsey, Pamela McCue Ferguson, Richard Lee Parton, Paul Timothy Hahm
  • Patent number: 5744287
    Abstract: The invention relates to a photographic element comprising a layer comprising a cyan dye forming coupler, a layer comprising a magenta dye forming coupler and a layer comprising a yellow dye forming coupler, wherein said layers further comprise silver halide emulsions, said emulsions comprise greater than 95 percent chloride and said element when exposed at less than 50 microseconds per pixel in each color record and at a resolution between 200 and 500 pixels per inch provides after development a maximum gamma between 3.4 and 6.0 in at least one color record layer within a log exposure range not exceeding 1.1.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: April 28, 1998
    Assignee: Eastman Kodak Company
    Inventors: Michael Richard Roberts, Alphonse Dominic Camp, Richard Lee Parton, Daniel John Collins
  • Patent number: 5674674
    Abstract: The invention relates to a photographic element comprising a silver halide emulsion wherein at least one layer contains a silver chloroiodide emulsion containing at least 95 mole percent chloride and contains a sensitizing dye of the following general formula (I): ##STR1## wherein: Z1 represents a halogen, a cyano group, an amide substituted aromatic group, or a heteroaromatic group that is directly appended to the benzene ring shown or an aromatic group that is attached through an amide linking group andZ2 represents a substituted or unsubstituted alkyl group, substituted or unsubstituted alkoxy group, cyano group, a substituted or unsubstituted amide group, a substituted or unsubstituted carbamoyl group, halogen, an amide substituted aromatic group, or a heteroaromatic group that is directly appended to the benzene ring shown or an aromatic group that is attached through an amide linking group andW1 is one or more ions as needed to balance the charge on the molecule andR1 and R2 are, independently, substitu
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: October 7, 1997
    Assignee: Eastman Kodak Company
    Inventors: James Lawrence Edwards, Benjamin Teh-Kung Chen, Richard Lee Parton