Patents by Inventor John J. Herrold

John J. Herrold 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).

  • Methods for inhibiting corrosion in cooling water systems
    Patent number: 5425914
    Abstract: A method of inhibiting the corrosion of iron-based metallurgies in contact with cooling water systems under severe corrosion inducing conditions comprising adding to said cooling water an aqueous combination of an alcohol, an acid, a fatty imidazoline, and an ethoxylated fatty diamine.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: June 20, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: J. Michael Brown, Herbert A. Roberts, John J. Herrold