Patents by Inventor William T. Macleish

William T. Macleish 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).

  • Polymeric neutralizing layer with temporary crosslinks from an organo-metallic crosslinking agent
    Patent number: 4355091
    Abstract: Elements for use in a photographic diffusion transfer process comprising a sheet-like support having a polymeric acid neutralizing layer bonded thereto, wherein said polymeric acid layer is formed from a composition including a crosslinking agent that effects temporary crosslinks within said polymeric layer to promote resistance to aqueous interference during film unit assembly, but which readily hydrolyze under processing conditions so as to accommodate swelling of the polymeric layer in the presence of alkali processing composition.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: October 19, 1982
    Assignee: Polaroid Corporation
    Inventors: William T. MacLeish, Ehud Shchori
  • Novel protective plastomeric sheet for identification card
    Patent number: 4115618
    Abstract: A protective plastomeric sheet material for lamination to an image containing layer of a diffusion transfer photographic product.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: September 19, 1978
    Assignee: Polaroid Corporation
    Inventors: William T. MacLeish, Joseph Shulman
  • Removable antiblocking top coat
    Patent number: 3976490
    Abstract: The present invention is directed to diffusion transfer photographic products especially useful as film units in film packs or the like. Essentially the photographic products presented comprise a photosensitive element which after processing can provide a useable negative which is preferably produced concurrently with the formation of a positive image pattern.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: August 24, 1976
    Assignee: Polaroid Corporation
    Inventor: William T. Macleish