Patents by Inventor Bernard D. Illingsworth, deceased

Bernard D. Illingsworth, deceased 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).

  • Cubic regular grain photographic reversal emulsions
    Patent number: RE29575
    Abstract: Direct-positive photographic emulsions comprising silver halide grains which have a substantially regular crystal shape in contrast to substantially irregular crystal shape, are disclosed. Such emulsions can contain electron acceptors and the grains can be fogged with both reduction and gold fogging agents. Photographic elements employing such emulsions and processes for preparing them are also disclosed.
    Type: Grant
    Filed: March 30, 1977
    Date of Patent: March 14, 1978
    Assignee: Eastman Kodak Company
    Inventor: Bernard D. Illingsworth, deceased
  • Direct-positive silver halide emulsion fogged with low levels of reduction and gold fogging agents
    Patent number: RE29930
    Abstract: Very high speed direct-positive photographic emulsions comprising silver halide grains fogged with both reduction and gold fogging agents are described. For some applications other fogging agents, e.g. compounds of metals more electropositive than silver, can be substituted for the gold fogging agent. Photographic elements employing such emulsions and processes for preparing them are also disclosed.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: March 13, 1979
    Assignee: Eastman Kodak Company
    Inventor: Bernard D. Illingsworth, deceased