Patents by Inventor Arthur H. Herz

Arthur H. Herz 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: 5370986
    Abstract: Polyhydroxyalkyl compounds and co-stabilizing agents are used to impart stabilizing or antifogging properties to photographic recording materials.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: December 6, 1994
    Assignee: Eastman Kodak Company
    Inventors: Roger Lok, Arthur H. Herz
  • Patent number: 5246827
    Abstract: A photosensitive silver halide emulsion is prepared by providing an emulsion containing an anionic acid-substituted and a neutral organic ripening agent and then growing silver halide grains in the emulsion. This combination of organic ripening agents of differing charge types produces a superadditive effect on the growth of silver halide crystals.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: September 21, 1993
    Assignee: Eastman Kodak Company
    Inventors: Arthur H. Herz, Roger L. Klaus, Dale E. Hamilton
  • Patent number: 5246826
    Abstract: The present invention relates to a process of preparing a photosensitive silver halide emulsion. In this process, an emulsion comprising an acid substituted organic ripening agent and a dispersing medium is prepared. Silver halide grains are then permitted to grow in the emulsion at a pH of from about 2 to about 4.6 to accelerate the growth of the silver halide grains. Subsequently, the pH of the emulsion is adjusted to a value of about 5.3 to about 7 to repress grain growth, to prevent interference with dye sensitization, and to limit fog formation, particularly during storage of the coated emulsion.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: September 21, 1993
    Assignee: Eastman Kodak Company
    Inventors: Arthur H. Herz, Roger L. Klaus, George J. Burgmaier
  • Patent number: 5246825
    Abstract: Photosensitive silver halide emulsions are prepared by providing an emulsion containing an anionic acid-substituted organic ripening agent and a salt of an element in Group IIA of the Periodic Table and then growing silver halide grains in the emulsion. This combination of an acid-substituted organic ripener and a salt of a Group IIA element produces a superadditive effect on the growth of silver halide crystals.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: September 21, 1993
    Assignee: Eastman Kodak Company
    Inventors: Arthur H. Herz, Roger L. Klaus
  • Patent number: 5232827
    Abstract: Stabilized photographic recording materials are described which comprise ammonium salts of inorganic acids or of organic acids and preferably those that contain polyhydroxyalkyl residues. Use of these stabilizing compounds in combination with recognized antifogging agents provides enhanced storage stability of coated photographic compositions.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: August 3, 1993
    Assignee: Eastman Kodak Company
    Inventors: Roger Lok, Arthur H. Herz
  • Patent number: 4865965
    Abstract: This invention is directed to a light sensitive silver halide emulsion comprising a cyclic ether compound having an acid function and to an element containing such emulsion and to a process for using same. The compound comprises, in the cyclic ring, at least two atoms from the group consisting of sulfur and selenium, each of which atoms being separated from one another by a chain of at least two carbon atoms. Such compound acts as a solvent and as a growth modifying agent for silver halide grains. Also described is a process for modifying the growth of silver halide grains.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: September 12, 1989
    Assignee: Eastman Kodak Company
    Inventors: Gerard Friour, Arthur H. Herz, Christian Paris, Marcel Riveccie
  • Patent number: 4810626
    Abstract: A photographic silver halide emulsion comprising a 1,1,3,3-tetrasubstituted middle chalcogen urea compound is described wherein at least one substituent comprises a nucleophilic center. The urea compound is an effective chemical sensitizing agent. A process for chemically sensitizing silver halide is also described.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: March 7, 1989
    Assignee: Eastman Kodak Company
    Inventors: George J. Burgmaier, Arthur H. Herz
  • Patent number: 4782013
    Abstract: This invention is directed to a photographic element containing a radiation-sensitive silver halide emulsion layer and a macrocyclic thia or selena ether compound which also comprises oxygen atoms. These macrocyclic compounds are improved silver halide ripening agents.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: November 1, 1988
    Assignee: Eastman Kodak Company
    Inventors: Arthur H. Herz, Roger L. Klaus
  • Patent number: 4749646
    Abstract: A photographic silver halide emulsion comprising a 1,1,3,3-tetrasubstituted middle chalcogen urea compound is described wherein at least one substituent comprises an acid function. The urea compound is an effective silver halide grain growth-modifying agent. A process for modifying the grain growth of silver halide is also described.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: June 7, 1988
    Assignee: Eastman Kodak Company
    Inventors: Arthur H. Herz, George J. Burgmaier
  • Patent number: 4713322
    Abstract: A photographic silver halide emulsion comprising a thioether compound having more than 2 sulfur atoms in alkyl chains substituted on benzene nuclei. The compounds are useful in enhancing silver halide crystal growth. A process for preparation of the emulsion is also described.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: December 15, 1987
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Arthur H. Herz
  • Patent number: 4695535
    Abstract: A photographic silver halide emulsion is described which comprises an acyclic thioether compound which is capable of enhancing silver halide crystal growth without causing fog formation. A process for preparation of the emulsion is also described.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: September 22, 1987
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Arthur H. Herz
  • Patent number: 4695534
    Abstract: A photographic silver halide emulsion comprising a thioether substituted pyridine compound having improved ripening properties. A process for preparation of the emulsion is also described.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: September 22, 1987
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Arthur H. Herz
  • Patent number: 4423140
    Abstract: Photographic silver halide emulsions are protected against latent image fading by aromatic latent image stabilizing compounds having the structure: ##STR1## wherein: R.sup.1 is hydrogen, alkyl, or aryl;R.sup.2 and R.sup.3 are each individually hydrogen, alkyl, alkoxy, carboxy, alkoxycarbonyl, or aminocarbonyl;X is a middle chalcogen;Z represents the atoms completing an aromatic nucleus;n is an integer of 1 or 2; andM.sup..sym.n is a cation of valence n chosen from the group consisting of an onium ion, an ion from Group IA or IIA, and a metal ion from Group IIB, VIIB, IVA, or VA.
    Type: Grant
    Filed: June 25, 1298
    Date of Patent: December 27, 1983
    Assignee: Eastman Kodak Company
    Inventor: Arthur H. Herz
  • Patent number: 4374196
    Abstract: Photographic silver halide emulsions are protected against latent image fading by latent image stabilizing compounds having the structure: ##STR1## wherein: R.sup.1 is hydrogen, alkyl, or aryl;R.sup.2 and R.sup.3 are each individually hydrogen, alkyl, alkoxy, carboxy, alkoxycarbonyl, or aminocarbonyl;R.sup.4 and R.sup.5 are each individually hydrogen, alkyl, aryl, cyano, halogen, formyl, carboxy, alkoxycarbonyl, aryloxycarbonyl or aminocarbonyl;n is an integer of 1 or 2; andM.sup..sym.n is a cation of valence n.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: February 15, 1983
    Assignee: Eastman Kodak Company
    Inventor: Arthur H. Herz
  • Patent number: 4367279
    Abstract: Certain organic, carbon acid silver halide complexing agents in a photographic diffusion transfer system provide suitable replacement for conventional silver halide complexing agents. Such organic, silver halide complexing agents include certain sulfones, nitriles and onium salts. These are especially useful in a silver salt diffusion transfer system. They can be employed with silver halide developing agents, such as in a monobath, and are especially suitable with a hydroxylamine silver halide developing agent. Other addenda commonly employed in photographic diffusion transfer systems can be employed in combination with these silver halide complexing agents.
    Type: Grant
    Filed: September 6, 1974
    Date of Patent: January 4, 1983
    Assignee: Eastman Kodak Company
    Inventors: Arthur H. Herz, Daniel S. Daniel
  • Patent number: 4346154
    Abstract: A stain retarding concentration of a phosphine antistain agent or phosphine antistain agent precursor in the undercoat layer of a photographic silver halide element comprising a support having thereon (a) a photographic silver halide gelatino emulsion layer, and (b) an undercoat layer between the emulsion layer and the support, provides reduced stain in the element upon exposure and processing. The photographic element preferably comprises a silver halide developing agent. The photographic element, after exposure, is preferably processed by means of an aqueous alkaline activator bath and then an aqueous thiosulfate stabilizer bath.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: August 24, 1982
    Assignee: Eastman Kodak Company
    Inventors: Donald F. McLaen, Arthur H. Herz
  • Patent number: RE32195
    Abstract: Photographic silver halide emulsions are protected against latent image fading by aromatic latent image stabilizing compounds having the structure: ##STR1## wherein: R.sup.1 is hydrogen, alkyl, or aryl;R.sup.2 and R.sup.3 are each individually hydrogen, alkyl, alkoxy, carboxy, alkoxycarbonyl, or aminocarbonyl;X is a middle chalcogen.[.;.]. .Iadd.chosen from the class consisting of sulfur and selenium; .Iaddend.Z represents the atoms completing an aromatic nucleus;n is an integer of 1 or 2; andM.sup..sym.n is a cation of valence n chosen from the group consisting of an onium ion, an ion from Group IA or IIA, and a metal ion from Group IIB, VIIB, IVA, or VA.
    Type: Grant
    Filed: April 4, 1985
    Date of Patent: July 1, 1986
    Assignee: Eastman Kodak Company
    Inventor: Arthur H. Herz