Patents by Inventor Michel Tchapian

Michel Tchapian 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).

  • Method of treating the surface of an aged PVC object
    Patent number: 7235282
    Abstract: A process for the treatment of natural discoloration in an article, particularly a vinyl chloride polymer article, by treating the surface of the article in ambient air with a first organic solution containing an organic peroxide and a first organic solvent. The invention process is particularly useful for vinyl chloride-based articles that have undergone pinking.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: June 26, 2007
    Assignee: Solvay (Societe Anonyme)
    Inventors: Michel Tchapian, Xavier Coudry, Pierre Lomenech, Patrick Charles, Richard Thommeret
  • Method of treating the surface of aged objects with polyvinyl chloride
    Publication number: 20040234700
    Abstract: Process for the treatment of articles made of a polymer composition comprising a vinyl chloride polymer which have naturally surface aged, which comprises a stage according to which the surface of the articles is treated in ambient air with an organic solution comprising an organic peroxide and an organic solvent.
    Type: Application
    Filed: March 16, 2004
    Publication date: November 25, 2004
    Inventors: Michel Tchapian, Xavier Coudry, Pierre Lomenech, Patrick Charles, Richard Thommeret