Patents by Inventor Tillmon H. Pearson

Tillmon H. Pearson 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).

  • Metal sequestering method
    Patent number: 4107064
    Abstract: A method for sequestering metal ions using .alpha.,.alpha.'-carboxyalkoxy succinic acid or salts thereof in combination with a surfactant. SPCROSS-REFERENCE TO RELATED APPLICATIONSThis application is a division of application Ser. No. 682,320, filed May 3, 1976, now U.S. Pat. No. 4,066,687, which is a division of application Ser. No. 385,545, filed Aug. 3, 1973, now U.S. Pat. No. 3,980,578, which in turn is a continuation-in-part of application Ser. No. 153,816, filed June 16, 1971, now U.S. Pat. No. 3,784,486.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: August 15, 1978
    Assignee: Ethyl Corporation
    Inventors: Gunner E. Nelson, Tillmon H. Pearson
  • 2,3-Carboxy alkoxy succinic acid and salts thereof
    Patent number: 4066687
    Abstract: .alpha.,.alpha.'-carboxyalkoxy succinic acids and salts thereof are described in which the carboxyalkoxy radicals contain from 2 to about 7 carbon atoms and which are useful as sequestrants and in which the carboxyalkoxy radicals contain from about 8 to about 30 carbon atoms and which are useful as lubricant additives, sizing agents for paper and textiles, and the like. A method is disclosed for sequestering polyvalent metal ions using .alpha.,.alpha.'-carboxyalkoxy succinic acid or salts thereof. A method for sequestering polyvalent metal ions is disclosed using .alpha.,.alpha.'-carboxyalkoxy succinic acid or salts thereof in combination with a surfactant.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: January 3, 1978
    Assignee: Ethyl Corporation
    Inventors: Gunner E. Nelson, Tillmon H. Pearson
  • Metal sequestering method and composition using .alpha.,.alpha.'-carboxyalkoxy succinic acid compounds
    Patent number: 3980578
    Abstract: .alpha.,.alpha.'-carboxyalkoxy succinic acids and salts thereof are described in which the carboxyalkoxy radicals contain from 2 to about 7 carbon atoms and which are useful as sequestrants and in which the carboxyalkoxy radicals contain from about 8 to about 30 carbon atoms and which are useful as lubricant additives, sizing agents for paper and textiles, and the like. A method is disclosed for sequestering polyvalent metal ions using .alpha.,.alpha.'-carboxyalkoxy succinic acid or salts thereof. A method for sequestering polyvalent metal ions is disclosed using .alpha.,.alpha.'-carboxyalkoxy succinic acid or salts thereof in combination with a surfactant.
    Type: Grant
    Filed: August 3, 1973
    Date of Patent: September 14, 1976
    Assignee: Ethyl Corporation
    Inventors: Gunner E. Nelson, Tillmon H. Pearson