Patents by Inventor Lawrence M. Cenegy

Lawrence M. Cenegy 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 protecting steel water handling facilities from corrosion
    Patent number: 5660874
    Abstract: Corrosion by water of mild steel pipe is inhibited by the controlled addition of NaHCO.sub.3 to the water (containing calcium ions) in sufficient amounts to induce corrosion and form scale. The scale deposits on the pipe at the corrosion sites form a protective film thereon. The addition of the NaHCO.sub.3 is controlled by the use of corrosion electrode probes placed in the pipe.
    Type: Grant
    Filed: February 14, 1996
    Date of Patent: August 26, 1997
    Assignee: Nalco/Exxon Energy Chemicals, L.P.
    Inventors: Anthony R. Pitochelli, Lawrence M. Cenegy, James D. Watson, John G. Garcia, Jr.
  • Method of treating geothermal wells with acrylate/acrylamide scale inhibitor
    Patent number: 5044439
    Abstract: A geothermal water well is treated with an effective amount of a scale inhibitor formulation containing a Na acrylate/acrylamide copolymer to inhibit the buildings of CaCO.sub.3 scale therein.
    Type: Grant
    Filed: May 10, 1990
    Date of Patent: September 3, 1991
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Lawrence M. Cenegy, Darrel F. Griffith, George W. M. Hobbs
  • Process for recovery of precious metals from carbonaceous ores using chlorine dioxide
    Patent number: 4941917
    Abstract: Carbonaceous ore containing a precious metal (gold) is treated with an aqueous solution of chlorine dioxide to enhance the recovery of the precious metal.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: July 17, 1990
    Assignees: Exxon Chemical Patents Inc.,, Barrick (USA) Inc.
    Inventors: Lawrence M. Cenegy, Samuel G. Deal, Max E. Cooley, Paul B. Clark