Patents by Inventor Longchun Chen

Longchun Chen 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).

  • Inhibition of corrosion in aqueous systems
    Patent number: 6379587
    Abstract: A method and composition for controlling corrosion of metals, particularly ferrous-based metals in contact with aqueous systems is disclosed, which includes treating industrial waters with a combination of (a) a tetrazolium salt of the general formula: wherein R1, R2 and R3 may be various organic or inorganic substituents, including monomers or oligomers of the above structure, and (b) polyacrylic or polymaleic acid.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: April 30, 2002
    Assignee: BetzDearborn Inc.
    Inventor: Longchun Chen