Patents by Inventor William Marion Hoffman

William Marion Hoffman 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).

  • Selected crystalline calcium carbonate builder for use in detergent compositions
    Patent number: 6610645
    Abstract: A detergent composition containing an inexpensive detergent builder in the form of a selected crystalline calcium carbonate is provided. Specifically, the crystalline calcium carbonate has a substantially rhombohedral crystal structure with {1,0-1,1} crystallographic indices. The crystalline calcium carbonate can be calcite that has been specially modified to a rhombohedral crystal structure with {1,0-1,1} indices. The crystalline calcium carbonate of the present invention is extremely inexpensive because it can be readily formed from inexpensive naturally occurring calcite, and it performs well even when used at large median particle sizes.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: August 26, 2003
    Inventors: Eugene Joseph Pancheri, Robert Henry Rohrbaugh, Scott William Capeci, William Marion Hoffman, Rose Marie Weitzel
  • Process for making high-active detergent agglomerates by multi-stage surfactant paste injection
    Patent number: 6423679
    Abstract: A process is provided for producing high-active detergent agglomerates through multi-stage surfactant paste injection. According to the process, starting detergent materials are mixed with an initial amount of surfactant paste and then allowed to age for a specified period of time. Following the initial paste injection and aging period, additional amounts of surfactant paste are injected incrementally to make a final detergent agglomerate having at least about 45% by weight of surfactant.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: July 23, 2002
    Assignee: The Procter & Gamble Company
    Inventors: Scott William Capeci, William Marion Hoffman, Paul R Mort, III, Millard Edward Sullivan
  • PROCESS FOR MAKING HIGH-ACTIVE DETERGENT AGGLOMERATES BY MULTI-STAGE SURFACTANT PASTE INJECTION
    Publication number: 20020032144
    Abstract: A process is provided for producing high-active detergent agglomerates through multi-stage surfactant paste injection. According to the process, starting detergent materials are mixed with an initial amount of surfactant paste and then allowed to age for a specified period of time. Following the initial paste injection and aging period, additional amounts of surfactant paste are injected incrementally to make a final detergent agglomerate having at least about 45% by weight of surfactant.
    Type: Application
    Filed: January 14, 2000
    Publication date: March 14, 2002
    Inventors: SCOTT WILLIAM CAPECI, WILLIAM MARION HOFFMAN, PAUL MORT III, MILLARD EDWARD SULLIVAN
  • SELECTED CRYSTALLINE CALCIUM CARBONATE BUILDER FOR USE IN DETERGENT COMPOSITIONS
    Publication number: 20020004476
    Abstract: A detergent composition containing an inexpensive detergent builder in the form of a selected crystalline calcium carbonate is provided. Specifically, the crystalline calcium carbonate has a substantially rhombohedral crystal structure with {1,0,-1,1} crystallographic indices. The crystalline calcium carbonate can be calcite that has been specially modified to a rhombohedral crystal structure with {1,0,-1,1} indices. The crystalline calcium carbonate of the present invention is extremely inexpensive because it can be readily formed from inexpensive naturally occurring calcite, and it performs well even when used at large median particle sizes.
    Type: Application
    Filed: September 10, 1999
    Publication date: January 10, 2002
    Inventors: EUGENE JOSEPH PANCHERI, ROBERT HENRY ROHRBAUGH, SCOTT WILLIAM CAPECI, WILLIAM MARION HOFFMAN, ROSE MARIE WEITZEL