Patents by Inventor Henry W. Altland

Henry W. Altland 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).

  • Photographic element and process employed combination of surface and internal latent image silver halide
    Patent number: 4459351
    Abstract: A redox release compound that is capable upon oxidation of releasing a silver ion complexing heterocyclic thio moiety enables reduction of the concentration of silver required in a photographic silver halide material comprising a combination of (i) photographic silver halide capable of forming a surface latent image, and (ii) a photographic silver halide capable of forming an internal latent image. The silver halide capable of forming an internal latent image preferably has lower photosensitivity than the silver halide capable of forming a surface latent image. The redox release compound preferably comprises a silver ion complexing 1,2,4-triazolium-3-thio moiety. An image is developed in such an exposed photographic silver halide element by means of a surface type silver halide developer.
    Type: Grant
    Filed: June 22, 1983
    Date of Patent: July 10, 1984
    Assignee: Eastman Kodak Company
    Inventors: Anthony Adin, Henry W. Altland
  • Dye-forming compositions
    Patent number: 4425424
    Abstract: There is disclosed a radiation-sensitive composition comprising a leuco dye and a sulfonyloxy-N photooxidant that converts the leuco dye to a dye having a color different from that of its leuco form, when exposed to activating radiation. Improved print-out densities are obtained using this composition in image-forming methods.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: January 10, 1984
    Assignee: Eastman Kodak Company
    Inventors: Henry W. Altland, Raymond W. Ryan, Jr., Phillip P. Senise, Jr., Michael J. Lindstrom
  • Mesoionic 1,2,4-triazolium silver halide stabilizer precursors
    Patent number: 4404390
    Abstract: Mesoionic 1,2,4-triazolium-3-thiolate silver halide stabilizer precursors are novel compounds useful in a heat developable and heat stabilizable photographic silver halide materials and processes. After imagewise exposure of the photographic material, a developed and stabilized silver image is produced by heating the element. Mesoionic stabilizer precursors are also useful in photographic silver halide processing compositions.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: September 13, 1983
    Assignee: Eastman Kodak Company
    Inventors: Henry W. Altland, Daniel D. Shiao
  • Mesoionic 1,2,4-triazolium-3-thiolates as silver halide stabilizers and fixing agents
    Patent number: 4378424
    Abstract: Mesoionic 1,2,4-triazolium-3-thiolates are silver halide stabilizers and fixing agents. They are useful in heat developable and heat stabilizable photographic silver halide materials and processes. After imagewise exposure of the photographic materials, developed and stabilized silver images are produced by heating the materials. The mesoionic 1,2,4-triazolium-3-thiolates are also silver halide stabilizers and fixing agents in photographic silver halide processing compositions.
    Type: Grant
    Filed: November 24, 1981
    Date of Patent: March 29, 1983
    Assignee: Eastman Kodak Company
    Inventors: Henry W. Altland, Edward L. Dedio, Gary J. McSweeney
  • Mesoionic silver halide stabilizer precursor and use in a heat developable and heat stabilizable photographic silver halide material and process
    Patent number: 4351896
    Abstract: Mesoionic 1,2,4-triazolium-3-thiolate silver halide stabilizer precursors are novel compounds useful in a heat developable and heat stabilizable photographic silver halide materials and processes. After imagewise exposure of the photographic material, a developed and stabilized silver image is produced by heating the element. Mesoionic stabilizer precursors are also useful in photographic silver halide processing compositions.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: September 28, 1982
    Assignee: Eastman Kodak Company
    Inventors: Henry W. Altland, Daniel D. Shiao