Patents by Inventor Keith M. Roussel

Keith M. Roussel 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).

  • Process for the preparation of recarburizer coke
    Patent number: 5059301
    Abstract: Recarburizer coke containing not more than 0.1 weight percent sulfur and not more than 0.1 weight percent nitrogen is prepared by severe catalytic hydrotreating, followed by thermal cracking, and delayed coking of vacuum gas oil obtained from the vacuum distillation of FCC decant oil.
    Type: Grant
    Filed: March 20, 1991
    Date of Patent: October 22, 1991
    Assignee: Conoco
    Inventors: Keith M. Roussel, John K. Shigley
  • Delayed coking process
    Patent number: 5028311
    Abstract: Premium coke having a low coefficient of thermal expansion and containing reduced fluff coke is obtained by subjecting an aromatic mineral oil to reduced temperature delayed coking, thereafter converting uncoked oil in the coke drum to coke under delayed coking conditions by continuing coking in the presence of a aromatic mineral oil capable forming coke admixed with a non-coking material circulated through the coke drum as a heating fluid. After termination of the heating fluid, the coke in the coke drum is subjected to a heat soak in the presence of a non-coking material at an elevated temperature preferably above the delayed coking conditions.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: July 2, 1991
    Assignee: Conoco Inc.
    Inventors: John K. Shigley, Keith M. Roussel, Steve D. Harris
  • Method of making graphite electrode nipple
    Patent number: 4998709
    Abstract: The present invention resides in improved graphite nipples which are suitable for connecting graphite electrodes. The graphite nipples are prepared by adding mesophase pitch-based carbon fibers into a typical nipple extrusion blend.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: March 12, 1991
    Assignee: Conoco Inc.
    Inventors: Robert R. Griffin, Keith M. Roussel, Ta-Wei Fu
  • Binder pitch and method of preparation
    Patent number: 4959139
    Abstract: Binder pitch is prepared by combining a petroleum aromatic mineral oil thermal tar and super finely subdivided calcined premium coke particles. The petroleum aromatic mineral oil thermal tar is obtained by hydrotreating, thermally cracking and vacuum distilling an aromatic mineral oil. Additionally, the aromatic mineral oil thermal tar may be subjected to heat soaking.
    Type: Grant
    Filed: January 9, 1989
    Date of Patent: September 25, 1990
    Assignee: Conoco Inc.
    Inventors: Dave L. Blakeburn, II, Ta-Wei Fu, Keith M. Roussel