Patents by Inventor Alastair J. Pretty

Alastair J. Pretty 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).

  • Bleach compositions comprising metal-containing bleach catalysts and antioxidants
    Patent number: 5622646
    Abstract: Bleaching compositions useful for laundering fabrics comprising a metal bleach catalyst and an effective amount of an antioxidant.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: April 22, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Stefano Scialla, Alastair J. Pretty
  • Bleach activator compositions containing an antioxidant
    Patent number: 4853143
    Abstract: Bleach activator, bleach and detergent compositions comprising:(a) a peroxyacid bleach precursor having the general formula IAc--L Iwherein Ac is the acyl moiety of an organic carboxylic acid comprising an optionally substituted, linear or branched C.sub.6 -C.sub.20 alkyl or alkenyl moiety or a C.sub.6 -C.sub.20 alkyl-substituted aryl moiety and L is a leaving group, the conjugate acid of which has a pKa in the range from 4 to 13, and(b) an antioxidant.The compositions combine excellent stability, substrate-safety, water-dispersibility, granulometry and detergency performance.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: August 1, 1989
    Assignee: The Procter & Gamble Company
    Inventors: Frederick E. Hardy, Frank Cselik, Alastair J. Pretty, Kenneth Young, Gerald Scott