Patents by Inventor Raymond B. Hanselman

Raymond B. Hanselman 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).

  • Stripping sheet for use with diffusion transfer film unit
    Patent number: 4359518
    Abstract: A stripping sheet adapted for use with a diffusion transfer film unit to remove at least the photosensitive layer from said film unit subsequent to processing is disclosed, as well as methods for using said stripping sheet, wherein said stripping sheet comprises a support, carrying in order, a water-absorbing layer, and a layer capable of conversion from substantial liquid processing composition impermeability to a condition of substantial liquid processing composition permeability.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: November 16, 1982
    Assignee: Polaroid Corporation
    Inventors: Raymond B. Hanselman, Karl J. Schreiber
  • Method for forming silver precipitating nuclei
    Patent number: 4259115
    Abstract: Noble metal silver precipitating nuclei are prepared by reducing a noble metal salt or complex in the presence of a polymer with a Sn.degree. suspension formed by the borohydride reduction of a tin salt. The invention is also directed to film units employing said nuclei.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: March 31, 1981
    Assignee: Polaroid Corporation
    Inventors: Raymond B. Hanselman, John J. Magenheimer, Kenneth G. Scott