Patents by Inventor Gretchen Crumbaugh

Gretchen Crumbaugh 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 purifying 1,3,5-triisopropylbenzene
    Patent number: 6399847
    Abstract: The present invention relates to a method of purifying 1,3,5-triisopropylbenzene that comprises combining inpure 1,3,5-triisopropylbenzene with a sulfonating agent to form a reaction mixture, mixing the reaction mixture at a temperature in the range of about 0° C. to about 50° C., and collecting the purified 1,3,5-triisopropylbenzene.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: June 4, 2002
    Assignee: Warner-Lambert Company
    Inventors: Gretchen Crumbaugh, Dieter Schweiss, Jonathan Charles Walker
  • METHOD OF PURIFYING 1,3,5-TRIISOPROPYLBENZENE
    Publication number: 20020028978
    Abstract: The present invention relates to a method of purifying 1,3,5-triisopropylbenzene that comprises combining impure 1,3,5-triisopropylbenzene with a sulfonating agent to form a reaction mixture, mixing the reaction mixture at a temperature at about 20° C. or above, and collecting the purified 1,3,5-triisopropylbenzene.
    Type: Application
    Filed: July 29, 1999
    Publication date: March 7, 2002
    Inventors: GRETCHEN CRUMBAUGH, DIETER SCHWEISS, JONATHAN CHARLES WALKER