Patents by Inventor Dominique Marchant

Dominique Marchant 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).

  • Water in oil dispersions of hydrophilic polymers based on acrylic acid partially or totally converted into the salt form with ammonia
    Patent number: 4906685
    Abstract: Water in oil dispersions of hydrophilic polymers based on acrylic acid partially or totally converted into the salt form with ammonia, which dispersions contain:(a) 65 to 75% of an aqueous dispersed phase, 35 to 50% of which is a hydrophilic copolymer, having a molecular weight greater than 3.times.10.sup.6, based on 0 to 50% acrylamide and 0.008 to 0.1% bisacrylamidoacetic acid partially or totally converted into the salt form with ammonia;(b) 3 to 7% of an emulsifying system, having overall an HLB value greater than 7,(c) the remainder (up to 100%) being an oil phase.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: March 6, 1990
    Assignee: Societe Francaise Hoechst
    Inventors: Jean Cabestany, Dominique Marchant