Patents by Inventor Taun-Phat Dang

Taun-Phat Dang 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).

  • Noncatalyzed synthesis of 4-hydroxyquinolines and/or tautomers thereof
    Patent number: 6465653
    Abstract: The 4-hydroxyquinoline compounds and/or tautomers thereof, notably 4-hydroxy-5,7-dichchloroquinoline, are synthesized in very high yields by hydrolyzing/decarboxylating a 4-hydroxyquinolinecarboxylic acid ester in the presence of water, whether in liquid or vapor state, but in the absence of any catalyst for such reaction(s).
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: October 15, 2002
    Assignee: Rhodia Chimie
    Inventors: Taun-Phat Dang, Alain Roustan