Patents by Inventor Suzanne M. Zefferi

Suzanne M. Zefferi 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 and compositions for inhibiting low carbon steel corrosion
    Patent number: 5720902
    Abstract: Disclosed are methods and compositions for inhibiting the corrosion of low carbon steel in contact with aqueous systems. The composition comprises a silicon compound containing a hydrolyzable group, a complex fluoro acid, and a cross-linking agent.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: February 24, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Suzanne M. Zefferi, Edward A. Rodzewich
  • Corrosion inhibition of calcium chloride brine
    Patent number: 5292455
    Abstract: A method of inhibiting corrosion of metals such as low carbon steel in contact with calcium chloride brine comprising adding to the brine or to the salt prior to dissolution 2-hydroxyphosphono-acetic acid.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: March 8, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Suzanne M. Zefferi, Roger C. May