Patents by Inventor Ronald E. Leone

Ronald E. Leone 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: 6255045
    Abstract: This invention relates to a photographic element comprising a support, a radiation sensitive silver halide emulsion layer and a water dispersible polymeric disulfonamidophenol that is substantially immobile in the element. The invention provides color photographic elements that exhibit improved stability, color reproduction and robustness in terms of processing variations; particularly variations in red density due to sensitizing dye.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: July 3, 2001
    Assignee: Eastman Kodak Company
    Inventors: Tienteh Chen, Stephen P. Singer, Ronald E. Leone
  • Patent number: 6107017
    Abstract: A photographic element comprises a support bearing at least one silver halide emulsion and at least one high-boiling solvent of structure I, below: ##STR1## wherein: each m is independently 0, 1 or 2;each R.sub.1 is independently methyl or ethyl;n is 2 to 7;each R.sub.2 and each R.sub.3 may be the same or different and is individually selected from hydrogen or an alkyl group with up to five carbon atoms; andthe sum of the number of carbon atoms in each R.sub.1 plus each R.sub.2 plus each R.sub.3 taken together is four to eight.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: August 22, 2000
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, Ronald E. Leone
  • Patent number: 6054258
    Abstract: The invention disclosed is a photographic element comprising a support bearing at least one silver halide emulsion and at least one high-boiling solvent of structure I, below: ##STR1## wherein: m is 0, 1 or 2;each R.sub.1 is an individually selected alkyl group with up to four carbon atoms;n is 2 to 5;each R.sub.2 and R.sub.3 may be the same or different and is individually selected from hydrogen or an alkyl group with up to four carbon atoms;p is 0 to 3;each R.sub.4 is independently a methyl or ethyl group; andthe sum of the number of carbon atoms in each R.sub.1 plus each R.sub.2 plus each R.sub.3 plus each R.sub.4 taken together is three to seven.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: April 25, 2000
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, Ronald E. Leone
  • Patent number: 5965341
    Abstract: The invention provides a photographic element comprising a silver halide emulsion layer sensitive to green light having associated therewith (a) a 1-aryl-3-anilino-4-benzotriazolyl-5-pyrazolone magenta dye-forming DIR coupler of a particular formula, and (b) a 1-aryl-3-anilino-4-phenylthio-5-pyrazolone magenta image dye forming coupler of a particular formula. The element of the invention provides an improved interimage of a green sensitized layer in a multicolor silver halide photographic element.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: October 12, 1999
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, Jerrold N. Poslusny, Ronald E. Leone
  • Patent number: 5942381
    Abstract: A photographic element comprising a silver halide emulsion layer having associated therewith a 1-phenyl-3-anilino-4-benzotriazolyl-5-pyrazolone magenta dye-forming DIR coupler of structure I: ##STR1## wherein: R.sub.1 is hydrogen, chlorine, fluorine or a methyl group;R.sub.2, R.sub.3, and R.sub.4 are individually selected from the group consisting of hydrogen, halogen, alkyl, phenyl, alkoxy, phenoxy, alkylthio, carbonamido, sulfonamido, carbamoyl, alkoxycarbonyl and aryloxycarbonyl groups;R.sub.5 is hydrogen, bromine, chlorine, fluorine, or an alkyl group;R.sub.6 and R.sub.7 are independently selected from the group consisting of hydrogen, halogen, carbonamido, carbamoyl, sulfonamido, sulfamoyl, alkylsulfonyl, arylsulfonyl, alkylsulfoxyl, arylsulfoxyl, sulfonyloxy, alkoxycarbonyl, aryloxycarbonyl, acyloxy, acyl, imido, trifluoromethyl and cyano groups, provided that at least one of R.sub.6 and R.sub.7 is not hydrogen;R.sub.8 and R.sub.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: August 24, 1999
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, Ronald E. Leone, Jerrold N. Poslusny
  • Patent number: 5856072
    Abstract: A color photographic element which comprises a light sensitive silver halide emulsion layer and a non-light sensitive interlayer containing a ballasted 5-carbamoyl-1,3-dihydroxybenzene compound. The element exhibits an improved ability to prevent oxidized developer from diffusing away from the imaging layer in which it formed and into other color records where it can form the wrong color dye.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: January 5, 1999
    Assignee: Eastman Kodak Company
    Inventors: Ronald E. Leone, Stephen P. Singer
  • Patent number: 5821039
    Abstract: A color photographic element which comprises a light sensitive silver halide emulsion layer containing a 5-carbamoyl-1,3-dihydroxybenzene compound having a ClogP of at least 4. The element provides a black and white image using conventional color negative processing.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: October 13, 1998
    Assignee: Eastman Kodak Company
    Inventors: Ronald E. Leone, Stephen P. Singer
  • Patent number: 5561036
    Abstract: An improved photographic element comprises a support bearing at least one silver halide emulsion layer having associated therewith a hydroquinone compound that functions as a scavenger for oxidized developing agent. The hydroquinone compound has sufficient bulk that it is substantially non-diffusible in the photographic element and has in the two-position thereof an asymmetric tertiary carbamoyl substituent. These scavenger compounds exhibit very high activity, have excellent stability upon long-term storage and do not leave colored residues after processing.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: October 1, 1996
    Assignee: Eastman Kodak Company
    Inventors: Stephen P. Singer, Ronald E. Leone
  • Patent number: 5561035
    Abstract: An improved photographic element comprises a support bearing at least one silver halide emulsion layer having associated therewith a pyrocatechol compound that functions as a scavenger for oxidized developing agent. The pyrocatechol compound has sufficient bulk that it is substantially non-diffusible in the photographic element and has in the four-position thereof a tertiary carbamoyl substituent. These scavenger compounds exhibit very high activity, have excellent stability upon long-term storage and do not leave colored residues after processing.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: October 1, 1996
    Assignee: Eastman Kodak Company
    Inventors: Stephen P. Singer, Ronald E. Leone
  • Patent number: 5521057
    Abstract: Photographic elements comprising certain 2-phenylcarbamoyl-1-naphthol image-modifying couplers exhibit proper hue, a resistance to dye crystallization, and a resistance to leuco cyan dye formation. Such couplers can be utilized for their image-modifying effect and can contribute substantially to the overall dye density of an image.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: May 28, 1996
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, Jerrold N. Poslusny, Ronald E. Leone, David A. Steele
  • Patent number: 5514530
    Abstract: Photographic elements comprising certain 2-phenylcarbamoyl-1-naphthol image-modifying couplers exhibit proper hue, a resistance to dye crystallization, and a resistance to leuco cyan dye formation. Such couplers can be utilized for their image-modifying effect and can contribute substantially to the overall dye density of an image.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: May 7, 1996
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, Jerrold N. Poslusny, Melvin M. Kestner, Ronald E. Leone, David A. Steele
  • Patent number: 5506094
    Abstract: Photographic elements comprising certain 2-phenylcarbamoyl-1-naphthol image-modifying couplers exhibit proper hue, a resistance to dye crystallization, and a resistance to leuco cyan dye formation. Such couplers can be utilized for their image-modifying effect and can contribute substantially to the overall dye density of an image.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: April 9, 1996
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, Jerrold N. Poslusny, Melvin M. Kestner, Ronald E. Leone, David A. Steele
  • Patent number: 5250399
    Abstract: A photographic coupler (A) capable, upon oxidative coupling, of forming a dye that can be washed out of a photographic element containing the coupler upon processing, comprises, in the coupling position, a coupling-off group that comprises, in sequence, a releasable ballasted carbamate timing group and a releasable benzotriazole, triazole or tetrazole development inhibitor group. Such a coupler is useful in photographic silver halide materials and processes to provide improved images.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: October 5, 1993
    Assignee: Eastman Kodak Company
    Inventors: Richard P. Szajewski, Jerrold N. Poslusny, David A. Steele, Teh-hsuan Chen, Paul A. Burns, Ronald E. Leone, William J. Begley
  • Patent number: 5104769
    Abstract: Photographic elements and emulsions are described which are capable of providing high contrast images. The elements and emulsions comprise negative working silver halide and contrast enhancing arylhydrazide nucleating agents. A process for utilization of the elements and emulsions is also described.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: April 14, 1992
    Assignee: Eastman Kodak Company
    Inventors: Jerome J. Looker, Ronald E. Leone, Lee J. Fleckenstein
  • Patent number: 4948721
    Abstract: Latent image stability is enhanced in photographic recording materials using N-alkyl- or N-alkenylbenzothiazolium or -benzoselenazolium salts.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: August 14, 1990
    Assignee: Eastman Kodak Company
    Inventors: Roger Lok, Ronald E. Leone
  • Patent number: 4874866
    Abstract: Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivatives compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addenda in silver halide photographic systems.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: October 17, 1989
    Assignee: Eastman Kodak Company
    Inventors: Wolfgang H. H. Gunther, Ronald E. Leone, Rosemary Przyklek
  • Patent number: 4831136
    Abstract: Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivative compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addends in silver halide photographic systems.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: May 16, 1989
    Assignee: Eastman Kodak Company
    Inventors: Wolfgang H. H. Gunther, Ronald E. Leone, Rosemary Przyklek
  • Patent number: 4576905
    Abstract: Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivative compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addenda in silver halide photographic systems.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: March 18, 1986
    Assignee: Eastman Kodak Company
    Inventors: Wolfgang H. H. Gunther, Ronald E. Leone, Rosemary Przyklek
  • Patent number: 4276364
    Abstract: Novel 3,3-disubstituted acylhydrazinophenylthiourea nucleating agents are disclosed as well as silver halide photographic emulsions and elements containing silver halide grains capable of forming an internal latent image having the nucleating agents adsorbed to the surface of the silver halide grains. Imaging processes in which these materials participate are also disclosed.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: June 30, 1981
    Assignee: Eastman Kodak Company
    Inventor: Ronald E. Leone
  • Patent number: T997004
    Abstract: Novel 3,3-disubstituted acylhydrazinophenylthiourea nucleating agents are disclosed as well as silver halide photographic emulsions and elements containing silver halide grains capable of forming an internal latent image having the nucleating agents adsorbed to the surface of the silver halide grains. Imaging processes in which these materials participate are also disclosed.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: August 5, 1980
    Inventor: Ronald E. Leone