Patents by Inventor Stephen William Sikra

Stephen William Sikra 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).

  • Patent number: 6017873
    Abstract: Two processes for producing agglomerated high density detergent compositions are provided. On process comprises blending secondary (2,3) alkyl sulfate with a detergency builder to form a homogeneous powder mixture which is agglomerated with a surfactant paste mixture comprising C.sub.10-20 linear alkylbenzene sulfonates, C.sub.10-20 alkyl sulfates, C.sub.10-18 alkyl ethoxy sulfates having from about 1 to about 7 ethoxy groups, alcohol ethoxylates and polyethylene glycol and drying the agglomerates. Another process comprises blending secondary (2,3) alkyl sulfate with a detergency builder to form a homogeneous powder mixture which is agglomerated with a liquid acid precursor of C.sub.10-20 linear alkylbenzene sulfonate so as to form an agglomerated detergent composition which has a density of at least about 650 g/l.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: January 25, 2000
    Assignee: The Procter & Gamble Compnay
    Inventors: Stephen William Sikra, James Bert Royston
  • Patent number: D439841
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: April 3, 2001
    Assignee: The Procter & Gamble Company
    Inventors: John Dwayne Walther, Christophe Nicolas Degoix, Stephen William Sikra, Felix James Scarlett
  • Patent number: D449227
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: October 16, 2001
    Assignee: The Procter & Gamble Company
    Inventors: John Dwayne Walther, Christophe Nicolas Degoix, Stephen William Sikra, Felix James Scarlett
  • Patent number: D471465
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: March 11, 2003
    Assignee: The Procter & Gamble Company
    Inventors: Stephen William Sikra, Michael Robert Fox, Hector Roman