Patents by Inventor Frederick C. Klaessig

Frederick C. Klaessig 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 and compositions for penetrating and removing accumulated corrosion products and deposits from metal surfaces
    Patent number: 4789406
    Abstract: Methods for removing iron oxide and other accumulated corrosion products from metal surfaces in contact with aqueous systems, such as cooling water systems, are disclosed. The method steps can be performed without requirement of system shutdown and without requirement of acidic conditions. The methods comprise contacting the corroded surface with an organic reductant/chelant and an inorganic reducing agent while the pH of the aqueous system is maintained within the substantially neutral range of about 6.5-7.5. Pyrogallol and methyl gallate may be used as the organic reductant/chelant.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: December 6, 1988
    Assignee: Betz Laboratories, Inc.
    Inventors: E. Paul Holder, Frederick C. Klaessig, Pamela J. Peerce-Landers, David W. Reichgott
  • Method for treating black liquor using acrylic acid polymer
    Patent number: 4263092
    Abstract: A method is disclosed for inhibiting soft scale precipitation in black liquor systems by adding thereto polyacrylic acid.
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: April 21, 1981
    Assignee: Betz Laboratories, Inc.
    Inventors: Frederick C. Klaessig, Donald F. Jacques
  • Polyacrylic acids and methyl vinyl ether/maleic anhydride copolymers as soft scale inhibitors
    Patent number: 4255309
    Abstract: A method is disclosed for inhibiting soft scale precipitation in black liquor systems by adding thereto a treatment comprising in combination polyacrylic acid and methyl vinyl ether/maleic anhydride copolymer.
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: March 10, 1981
    Assignee: Betz Laboratories, Inc.
    Inventors: Frederick C. Klaessig, Donald F. Jacques