Patents by Inventor Surjit S. Chhatwal

Surjit S. Chhatwal 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).

  • Preparation of 5-tert-butyl-metaxylene using a solid active clay catalyst
    Patent number: 6939998
    Abstract: Alkylation of metaxylene with isobutylene using a solid active clay catalyst produces 5-tert-butyl-metaxylene with high isomer selectivity with respect to 4-tert-butyl-metaxylene. The process is controlled to extend catalyst life and significantly reduce environmentally unfriendly waste.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: September 6, 2005
    Assignee: The University of Southern Mississippi Research Foundation
    Inventors: Larry C. Satek, Stephen C. Jevne, Surjit S. Chhatwal
  • Preparation of 5-tert-butyl-metaxylene using a solid active clay catalyst
    Publication number: 20040152934
    Abstract: Alkylation of metaxylene with isobutylene using a solid active clay catalyst produces 5-tert-butyl-metaxylene with high isomer selectivity with respect to 4-tert-butyl-metaxylene. The process is controlled to extend catalyst life and significantly reduce environmentally unfriendly waste.
    Type: Application
    Filed: September 8, 2003
    Publication date: August 5, 2004
    Inventors: Larry C. Satek, Stephen C. Jevne, Surjit S. Chhatwal