Patents by Inventor André Couture

André Couture 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 for the regeneration of used silica gel
    Patent number: 6248683
    Abstract: The present invention is concerned a process for the regeneration of the spent silica gel used in chromatography and for any other kind of silica. The process comprises 5 main steps, namely: washing with an extractant of organic compounds and removing volatile organic materials remaining thereafter; oxidation to oxidize organic compounds remaining and, preferably, bleach the material; washing with an acid to remove soluble inorganic matter; heating to dry the material and combust any remaining organic compounds present; and recovering the regenerated material. Various optional steps can be added to the process.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: June 19, 2001
    Assignee: Silicycle Inc.
    Inventors: Luc Fortier, Simon Côté, Hugo St-Laurent, Simon Bernier, André Couture