Patents by Inventor Scott R. Harder

Scott R. Harder 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).

  • Volatile tracers for diagnostic use in steam generating systems
    Patent number: 5282379
    Abstract: In a diagnostic method wherein steam condensate is evaluated, the proportion of condensate water from one steam source, versus other steam sources, is determined by adding at an addition point a tracer that is selectively carried over into the steam.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: February 1, 1994
    Assignee: Nalco Chemical Company
    Inventors: Scott R. Harder, Claudia C. Pierce, Brian F. Post
  • Method of scavenging oxygen from boiler waters with substituted quinolines
    Patent number: 5167835
    Abstract: New oxygen scavengers for boiler waters have been discovered, which oxygen scavengers are based upon substituted quinoline compounds. These compounds provide oxygen scavenging capabilities, metal passivating capabilities, and volatility such that condensate systems in an operating boiler are protected. The compounds may be formulated with other oxygen scavengers and other common treatment agents used in boiler waters, especially the volatile amine, such as, but not limited to, morpholine and diethylhydroxylamine.The preferred quinoline compounds is ethoxyquin, i.e. 6-ethoxy-1,2,-dihydro-2,2,4-dihydroquinoline.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: December 1, 1992
    Assignee: Nalco Chemical Company
    Inventor: Scott R. Harder
  • Method of retarding corrosion of metal surfaces in contact with boiler water systems which corrosion is caused by dissolved oxygen
    Patent number: 5091108
    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 boilder 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: February 21, 1991
    Date of Patent: February 25, 1992
    Assignee: Nalco Chemical Company
    Inventors: Scott R. Harder, Cynthia A. Soderquist, Claudia C. Pierce