Patents by Inventor William H. Colvin

William H. Colvin 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).

  • Method for preparing basic aluminum chlorosulfate
    Patent number: 5124139
    Abstract: A process for preparing basic aluminum chlorosulfate comprising:1) forming a reaction mixture in an aqueous medium of aluminum chloride and aluminum sulfate in a molar ratio of aluminum chloride: aluminum sulfate ranging from about 0.75:1 to about 1:3 to 1 followed by2) basifying the product by reacting the product of step 1) with a source of calcium sufficient and under conditions sufficient to form a polymer.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: June 23, 1992
    Assignee: Rhone-Poulenc Inc.
    Inventors: William H. Colvin, Michael P. White