Patents Assigned to Polaroid Corporatiion
  • Diffusion transfer photographic film unit
    Patent number: 6541177
    Abstract: A self-developing diffusion transfer photographic film unit which includes a latent image which becomes visible upon photographic processing of the film unit. The latent image is formed with a chemical compound such as an indicator dye and the visible image formed from the latent image as a result of photographic processing may be transient or permanent. Also described are diffusion transfer photographic methods.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: April 1, 2003
    Assignee: Polaroid Corporatiion
    Inventors: James A. Foley, Michael P. Filosa, Stephen J. Telfer, John L. Marshall, David P. Waller