Patents by Inventor Scott R. Haraer

Scott R. Haraer 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 of retarding corrosion of metal surfaces in contact with boiler water systems which corrosion is caused by dissolved oxygen
    Patent number: 5164110
    Abstract: New oxygen scavengers for boiler waters have been discovered, which oxygen scavengers are based upon N,N,N',N'-tetra substituted phenylenediamines. These compounds provide oxygen scavenging capabilities, metal passivating capabilities, volatility such that condensate systems in an operating boiler are protected, and may be formulated with other oxygen scavengers and other common treatment agents used in boiler waters.The preferred tetra substituted phenylenediamines are N,N,N',N'-tetramethyl-1,4-phenylenediamines, or its precursors.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: November 17, 1992
    Assignee: Nalco Chemical Company
    Inventors: Scott R. Haraer, Cynthia A. Soderquist, Claudia C. Pierce