Patents by Inventor Jeffrey J. Lettrich

Jeffrey J. Lettrich 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).

  • Alkali earth metal oxide-based coating compositions
    Patent number: 4475949
    Abstract: A noncarbonated complex for use in preparing coating compositions is comprised of the reaction product of a basic oxide selected from the group consisting of calcium and magnesium oxide and mixtures thereof; an organic sulfonic acid having an equivalent weight of about 300 to 750 grams per equivalent; and water. The molar ratio of basic oxide to organic sulfonic acid is at least 10:1. The molar ratio of water to basic oxide is less than 2.5:1 and greater than 0.5:1 when the basic oxide is at least 30 percent calcium oxide. The molar ratio of water to basic oxide is less than 0.7:1 and greater than 0.3:1 when the basic oxide is less than 30 percent calcium oxide.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: October 9, 1984
    Assignee: Kimes Corporation
    Inventors: Norman C. Ross, Jeffrey J. Lettrich