Patents by Inventor Alan A. Bornstein

Alan A. Bornstein 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).

  • Non-hydroquinone photographic developer composition with lith quality and its method of usage
    Patent number: H2048
    Abstract: A non-hydroquinone photographic developer composition comprising: (a) a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, or alkali metal salts and mixtures thereof, in an amount of 0.1 to 0.4 mol/liter (mol/l); (b) an effective amount of an auxiliary developing agent comprising a 3-pyrazolidone compound, an aminophenol or a mixture thereof; (c) an alkali metal sulfite in an amount less than or equal to 0.32 mol/l; (d) an alkali metal carbonate in an amount of 0.1 to 0.4 mol/l; (e) an alkali metal hydroxide in an amount of from 0.08 to 2.0 mols/l; (f) with the developer composition having a pH of 11.8 or higher at 25° C.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: September 3, 2002
    Assignee: Fuji Hunt Photographic Chemicals, Inc.
    Inventors: Haixing Wan, Diane Zhang, David Carlson, Alan A. Bornstein