Patents by Inventor Jean C. Hilaire

Jean C. Hilaire 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).

  • Polyamide powder formed by particles having a gypsum rose structure and process for preparing such powder
    Patent number: 4927860
    Abstract: A polyamide powder consisting essentially of elementary porous particles having a "gypsum rose" structure and a process for preparing a polyamide powder comprising polymerizing by anionic polymerization lactam in a solvent medium in the presence of a catalyst, an activator, and at least one amide; one of which is N,N'-alkylene bisamide; said polymerization being initiated with said lactam and said amide used in an amount such that the solvent is in the supersaturated state at the polymerization initiation temperature.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: May 22, 1990
    Assignee: Atochem
    Inventors: Jean C. Hilaire, Roland Guerin