Patents by Inventor Debra L. Kendall

Debra L. Kendall 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).

  • Polymerization inhibitor for vinyl aromatic compounds
    Patent number: 4623431
    Abstract: A process for the distillation of readily polymerizable vinyl aromatic compounds which comprises subjecting said compounds to distillation conditions in the presence of oxygen and an effective amount of asphaltene as a polymerization inhibitor.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: November 18, 1986
    Assignee: Cosden Technology, Inc.
    Inventors: Debra L. Kendall, James R. Butler, Kevin P. Menard
  • Production of ortho-suppressed dialkyl benzenes
    Patent number: 4489214
    Abstract: A process for suppressing production of ortho isomers during catalytic alkylation of monoalkylbenzenes which comprises contacting the aromatic substrate with an alkylating agent in the presence of a crystalline silica polymorph silicalite catalyst material.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: December 18, 1984
    Assignee: Cosden Technology, Inc.
    Inventors: James R. Butler, Debra L. Kendall, Cleve H. Forward, James M. Watson, Gary D. Branum
  • Polymerization co-inhibitors for vinyl aromatic compounds
    Patent number: 4468343
    Abstract: A compound and a process for utilizing the compound to prevent the polymerization of vinyl aromatic compounds, such as styrene, during heating. The composition includes effective amounts of 2,6-dinitro-p-cresol and either a phenylenediamine or 4-tert-butylcatechol respectively, to act as a polymerization co-inhibitor system in the presence of oxygen.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: August 28, 1984
    Assignee: Cosden Technology, Inc.
    Inventors: James R. Butler, James M. Watson, Debra L. Kendall, Karen A. Mikkelson
  • Polymerization inhibition process for vinyl aromatic compounds
    Patent number: 4466905
    Abstract: A compound and a process for utilizing the compound to prevent the polymerization of vinyl aromatic compounds, such as styrene, during heating. The composition includes effective amounts of 2,6-dinitro-p-cresol and either a phenylenediamine or 4-tert-butylcatechol respectively, to act as a polymerization co-inhibitor system in the presence of oxygen.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: August 21, 1984
    Assignee: Cosden Technology, Inc.
    Inventors: James R. Butler, James M. Watson, Debra L. Kendall, Karen A. Mikkelson
  • Method and apparatus for inhibiting the formation of polymerized vinylaromatic compounds during distillative purification of vinylaromatic monomer
    Patent number: 4379736
    Abstract: A method and apparatus for inhibiting polymerization of vinylaromatic compounds during distillative purification wherein downcomers and tray bottoms of the distillation column exposed to high concentrations of liquid monomer condensate and low vapor velocities are coated with a non-wetting fluorocarbon polymer.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: April 12, 1983
    Assignee: Cosden Technology, Inc.
    Inventors: Debra L. Kendall, James M. Watson, Danny P. Wright