Patents by Inventor James P. Degraffenried

James P. Degraffenried 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 for improving the yield of heavy hydrocarbons in a thermal cracking process
    Patent number: 6464858
    Abstract: The incremental yield of hydrocarbons having five or more carbon atoms in a cracked product from a thermal cracking process is increased by contacting or treating the tubes of a thermal cracking furnace with a composition comprising tin and silicon.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: October 15, 2002
    Assignee: Phillips Petroleum Company
    Inventors: Ronald E. Brown, Larry E. Reed, James P. Degraffenried, Timothy P. Murtha, Gil J. Greenwood, Timothy P. Harper, Mark D. Scharre
  • Method of promoting the decomposition of silicon compounds in a process for depositing silicon upon a metal surface
    Patent number: 6056870
    Abstract: For a given percentage decomposition, the decomposition temperature of an organosilicon compound is reduced by admixing with the organosilicon compound a decomposition promoting organotin compound. The amount of decomposition promoting organotin compound admixed with the organosilicon compound is sufficient to effectively lower the decomposition temperature of the organosilicon required for a given percentage decomposition.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: May 2, 2000
    Inventors: Larry E. Reed, Ronald E. Brown, Timothy P. Murtha, Timothy P. Harper, James P. Degraffenried, Mark D. Scharre, Gil J. Greenwood
  • Method for treating the radiant tubes of a fired heater in a thermal cracking process
    Patent number: 5656150
    Abstract: A novel method for treating the radiant tubes of a fired pyrolysis heater with an antifoulant composition for inhibiting the formation and deposition of coke thereon. Such novel method includes introducing the antifoulant into the crossover conduit between the convection tubes and radiant tubes of the fired pyrolysis heater.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: August 12, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Larry E. Reed, Ronald E. Brown, James P. Degraffenried, Timothy P. Murtha, Gil J. Greenwood, Timothy P. Harper, Mark D. Scharre