Patents by Inventor Charles P. Talley

Charles P. Talley 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 of removing dioxane from phosphate ester surfactants
    Patent number: 4375437
    Abstract: Dioxane contaminant is removed from a phosphate ester surfactant having a chain of repeating ethyleneoxy units and containing residual phosphoric acid by means of a process which involves mixing the phosphate ester surfactant with a sufficient quantity of a neutralization agent of substantially completely neutralize residual phosphoric acid contained in said surfactant, and then separating dioxane from said phosphate ester surfactant until the dioxane level is below about 10 ppm. The neutralization agent can be a base such as sodium hydroxide.
    Type: Grant
    Filed: June 16, 1981
    Date of Patent: March 1, 1983
    Assignee: GAF Corporation
    Inventors: Michael M. Katz, Mohamed M. Hashem, Charles P. Talley
  • Quaternized siliceous supports for gel permeation chromatography
    Patent number: 4118316
    Abstract: Controlled porosity supports having a siliceous surface are treated with a silane compound followed by treatment with a quaternizing agent to introduce quaternary ammonium moieties on the beads which are used to perform molecular size separations on cationic polymers.
    Type: Grant
    Filed: October 13, 1976
    Date of Patent: October 3, 1978
    Assignee: Calgon Corporation
    Inventors: Charles P. Talley, Guy M. Bradley, Ronald T. Guliana