Patents by Inventor Joel Touet

Joel Touet 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).

  • Hydrophilic copolymers, their preparation and their use in separation techniques
    Patent number: 4192784
    Abstract: Water-insoluble, tridimensional cross-linked random copolymers, which contain in copolymerized form:(a) 25% to 98% by weight of N-[tris(hydroxymethyl)methyl]acrylamide or N-[tris(hydroxymethyl)methyl]methacrylamide or a mixture of these two compounds;(b) 2% to 50% by weight of one or more monomers having several polymerizable ethylenic double bonds and one or more hydroxy groups, and free from NH.sub.2 or COOH groups; and(c) 0% to 50% by weight of one or more monomers having a polymerizable ethylenic double bond and one or more amino or carboxy groups. These copolymers may be used, in the form of aqueous gels, as supports in techniques of separation such as gell permeation chromatography and in techniques of immobilization of natural substances.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: March 11, 1980
    Assignee: Mar-Pha Societe d'Etudes et d'Exploitation de Marques
    Inventors: Eric Brown, Egisto Boschetti, Monique M. Corgier, Joel Touet