Patents by Inventor Charles F. Kahle

Charles F. Kahle 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).

  • Reaction products of alpha-aminomethylene phosphonic acids and epoxy compounds and their use in coating compositions
    Patent number: 5091451
    Abstract: The disclosure is directed to a compound which is a reaction product of at least one phosphonic acid group of an alpha-aminomethylene phosphonic acid containing at least one group corresponding to the formula, ##STR1## with an epoxy group of a compound containing at least one epoxy group. The disclosure is also directed to waterborne coating compositions, organic solvent-borne coating compositions, and powder coating compositions containing the aforesaid reaction product.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: February 25, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Charles F. Kahle, II, Kurt G. Olson, James A. Claar, Paul H. Pettit, Jr., Paul R. Kerr
  • Reaction products of alpha-aminomethylene phosphonic acids and epoxy compounds and their use in coating compositions
    Patent number: 5034556
    Abstract: The disclosure is directed to a compound which is a reaction product of at least one phosphonic acid group of an alpha-aminomethylene phosphonic acid containing at least one group corresponding to the formula, ##STR1## with an epoxy group of a compound containing at least one epoxy group. The disclosure is also directed to waterborne coating compositions, organic solvent-borne coating compositions, and powder coating compositions containing the aforesaid reaction product.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: July 23, 1991
    Assignee: PPG Industries, Inc.
    Inventor: Charles F. Kahle, II
  • Preparation of alkyl primary amines
    Patent number: 4927969
    Abstract: Alkyl primary amines, e.g., tertiary alkyl primary amines, are prepared by reaction of the corresponding alkyl primary isocyanates with an alkanolamine to form an intermediate area reaction product, followed by heating to decompose the urea reaction product and form the amine product. The amine product can be recovered in high yield by vacuum distillation.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: May 22, 1990
    Assignee: PPG Industries, Inc.
    Inventors: Charles F. Kahle, II, Gregory J. McCollum, Craig A. Wilson