Patents by Inventor Yves M. Trehu

Yves M. Trehu 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).

  • Coating process for composite reverse osmosis membranes
    Patent number: 4980061
    Abstract: A process for preparing reverse osmosis membranes is disclosed. A microporous hollow support fiber is passed through a solution of a monomer capable of undergoing condensation polymerization and such as m-phenylene diamine up through a capillary into a sedond less dense solution of a second monomer capable of undergoing condensation with said first monomer, such as trimesoyl chloride or cyclohexane-1,3,5-tricarbonyl chloride. The resulting fiber has a polymeric film deposited thereon which is effective as a reverse osmosis membrane.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: December 25, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Safwat E. Tadros, Yves M. Trehu