Patents by Inventor Thomas G. Stewart, Jr.

Thomas G. Stewart, Jr. 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).

  • Bis-anthrols and bis-naphthols and diglycidyl ethers thereof
    Patent number: 4940809
    Abstract: Certain bis-anthrols and bis-naphthols and their diglycidyl ethers are novel and useful in the preparation of new polyether thermoplastic compositions.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: July 10, 1990
    Assignee: Shell Oil Company
    Inventors: Kenneth C. Dewhirst, Thomas G. Stewart, Jr.
  • Bis-anthrols and bis-naphthols and diglycidyl ethers thereof
    Patent number: 4908424
    Abstract: Certain bis-anthrols and bis-naphthols and their diglycidyl ethers are novel and useful in the preparation of new polyether thermoplastic compositions.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: March 13, 1990
    Assignee: Shell Oil Company
    Inventors: Kenneth C. Dewhirst, Thomas G. Stewart, Jr.
  • Bis-anthrols and bis-naphthols and diglycidyl ethers thereof
    Patent number: 4847011
    Abstract: Certain bis-anthrols and bis-naphthols and their diglycidyl ethers are novel and useful in the preparation of new polyether thermoplastic compositions. The compounds have the formulae: ##STR1## (or its keto tautomer) or ##STR2## where A is as defined in the claims.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: July 11, 1989
    Assignee: Shell Oil Company
    Inventors: Kenneth C. Dewhirst, Thomas G. Stewart, Jr.