Patents by Inventor Yves Roques

Yves Roques 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 for making adipic acid
    Patent number: 6822117
    Abstract: The present invention relates to a process for the manufacture of adipic acid, more particularly of adipic acid crystals. It relates more specifically to a process for the treatment of the adipic acid crystals obtained on conclusion of crystallization, which consists in dispersing the adipic acid crystals collected on conclusion of crystallization in a liquid medium, in stirring the said liquid medium and in then separating the said crystals from the said liquid medium and optionally drying them. The form of the crystals is modified in order to obtain pebbles with a substantially smooth surface.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: November 23, 2004
    Assignee: Rhodia Fiber and Resin Intermediates
    Inventors: Albert Felix, Yves Roques