Patents by Inventor Tran van Hoang

Tran van Hoang 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).

  • Process to produce polyparaphenylene vinylene or polyparathienylene vinylene polymers
    Patent number: 5384392
    Abstract: The invention is a new process to produce polyparaphenylene vinylene or polyparathienylene vinylene polymers using a sulfonium-based polyelectric precursor. This precursor is treated directly with acid to obtain the polymers required. These polymers have high molecular weights and are particularly advantageous in the plastics transformation field.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: January 24, 1995
    Assignee: Thomson-CSF
    Inventors: Olivier Sagnes, Jean-Claude DuBois, Valerie Massardier, Tran van Hoang, Alain Guyot