Patents by Inventor Shien-Liang Chang

Shien-Liang Chang 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).

  • Modified asphalt
    Patent number: 4780146
    Abstract: An asphalt composition comprises a bituminous material blended with a reaction product of ethylene diamine and a blend of a dibasic acid and one or more fatty acid residues.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: October 25, 1988
    Assignee: Owens-Corning Fiberglas Corporation
    Inventor: Shien-Liang Chang
  • Synthesis of (1-phenylethyl) hydroquinone
    Patent number: 4734531
    Abstract: An improved process is provided for synthesizing monosubstituted (1-phenylethyl) hydroquinone in high yields and with little contamination by disubstituted (1-phenylethyl) hydroquinone. The process is performed by reacting styrene and hydroquinone using a zeolite molecular sieve.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: March 29, 1988
    Assignee: Montedison S.p.A.
    Inventor: Shien-Liang Chang