Patents by Inventor Peter Jeffrey Twist

Peter Jeffrey Twist 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).

  • Photographic developer/amplifier compositions
    Patent number: 5837431
    Abstract: Processing of color photographic materials can be accomplished using an aqueous redox amplifier composition comprising a color developing agent, an antioxidant therefor, hydrogen peroxide, and a stabilizing amount of nitrite ions to reduce dye loss during storage.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: November 17, 1998
    Assignee: Eastman Kodak Company
    Inventors: Peter Jeffrey Twist, Christopher John Winscom
  • Photographic developer/amplifier compositions
    Patent number: 5738980
    Abstract: Processing of color photographic materials can be accomplished using an aqueous redox amplifier composition comprising a color developing agent, an antioxidant therefor, hydrogen peroxide, and a stabilizing amount of nitrite ions to reduce dye loss during storage.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: April 14, 1998
    Assignee: Eastman Kodak Company
    Inventors: Peter Jeffrey Twist, Christopher John Winscom