Patents by Inventor Peter D. Sills

Peter D. Sills 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).

  • Noble metal complexes to sensitize silver halide emulsions
    Patent number: 5556742
    Abstract: Silver halide photographic emulsions may be sensitized by the use of hydrido-phosphine noble metal compounds and especially platinum (II) compounds.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: September 17, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Charles G. Barlow, Peter R. Johns, Peter D. Sills
  • Supersensitization of red sensitized, silver halide emulsions with 5-substituted-amino-1,2,3,4-thiatriazoles
    Patent number: 5306612
    Abstract: 5-Substituted-amino-1,2,3,4-thiatriazoles have been found to be supersensitizers for silver halide photographic emulsions spectrally sensitized to the red region of the electromagnetic spectrum.
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: April 26, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James B. Philip, Jr., Craig A. Perman, Richard J. Loer, Peter D. Sills
  • Red and infrared films containing 5-substituted-thio-1,2,3,4-thiatriazoles and 5-substituted-oxy-1,2,3,4-thiatriazoles
    Patent number: 4914015
    Abstract: 5-substituted-thio-1,2,3,4-thiatriazoles and 5-substituted-oxy=1,2,3,4-thiatriazoles have been found to be supersensitive for silver halide photographic emulsions spectrally sensitized to the red and infrared regions of the electromagnetic spectrum.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: April 3, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James B. Philip, Jr., Craig A. Perman, Peter D. Sills
  • Automatically processible photographic element comprising a non-silver halide layer containing bromide
    Patent number: 4794070
    Abstract: Automatic processing equipment for photographic film, particularly radiographic black-and-white film, are required to handle different brands and constructions of film with the same processing chemistry. The Applicants have found that developer chemistry fluctuations seem to be very high when processing conventional films and newer, lower silver coating weight films. It has been found that the addition of an aqueous soluble, non-photosensitive bromide salt into radiographic film reduces the developer chemistry fluctuations.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: December 27, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James B. Philip, Jr., Peter D. Sills, James E. Lindquist
  • Supersensitization of silver halide emulsion
    Patent number: 4780404
    Abstract: 5-substituted-1,2,3,4-thiatriazoles have been found to be supersensitizers for silver halide photographic emulsions spectrally sensitized to the infrared.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: October 25, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Peter D. Sills, James B. Philip, Jr., Richard J. Loer, Craig Perman
  • Covering power in films
    Patent number: 4357419
    Abstract: A silver-halide/gelatin light-sensitive emulsion containing a saturated cyclic oxime compound, and optionally containing a di- or trimethylol lower alkane compound is disclosed. The light-sensitive emulsion coated on a substrate is particularly useful as a radiographic film.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: November 2, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Peter D. Sills