Patents by Inventor Manuel A. Santos-Rosario

Manuel A. Santos-Rosario 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).

  • Fixer additives used in combination with iron complex based bleaches to improve desilvering
    Patent number: 5434035
    Abstract: A method of treating a seasoned fixing solution comprising desilvering a fixing solution containing a chelating compound represented by Formula IMOOC(CH.sub.2)m(X)p((CH.sub.2).sub.n COOM).sub.q (I)where X is N, or C--OH;n and m are independently 0, 1, or 2;if X is N then p is 0 or 1 and q is 1 or 2;if X is C-OH then p is 0, 1 or 2 and q is 1 or 2; andM is a cationic counterion; andfurther containing a carryover amount of a bleaching agent which is a complex of ferric ion and a tridentate or a tetradentate ligand.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: July 18, 1995
    Assignee: Eastman Kodak Company
    Inventors: Mary E. Craver, Manuel A. Santos-Rosario, Keith H. Stephen