Patents by Inventor Maryvonne Nicaise

Maryvonne Nicaise 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).

  • Articular prosthesis and its preparation process
    Patent number: 4888019
    Abstract: A polymer articular prosthesis having a sliding surface, wherein the latter is constituted by a thin layer of said polymer grafted with tetrafluoro-ethylene.The process for preparing the articular prosthesis comprises coating with a protective varnish the outer surface of a polymer articular prosthesis having a sliding surface, except in the areas constituting this sliding surface irradiating the prosthesis with ionizing rays, contacting the prosthesis with the tetrafluoroethylene vapour for adequate time to bring about tetrafluoroethylene grafting over a limited thickness of the polymer forming the sliding surface and then removing the protective varnish.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: December 19, 1989
    Assignee: Compagnie Oris Industrie S.A.
    Inventors: Gilbert Gauneus, Maryvonne Nicaise, Kifu O. Tran
  • Solid polyvinyl alcohol-based support able to adsorb lipoproteins and its use for the separation of low density lipoproteins present in a liquid, such as blood plasma
    Patent number: 4781838
    Abstract: This support is constituted by a crosslinked polyvinyl alcohol hydrogel, whereof at least part of the --OH groups have been replaced by --OSO.sub.3 H groups. The crosslinked polyvinyl alcohol hydrogel comprises 70 to 95% by weight of chains derived from polyvinyl alcohol and 5 to 30% by weight of chains derived from crosslinking monomers, such as triethylene glycol diacrylate and tetraethylene glycol triacrylate.These supports can be used for the ex-vivo purification of the blood plasma in pocket 31 or 33.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: November 1, 1988
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Genevieve Crassous, Gilbert Gaussens, Dominique Duval, Maryvonne Nicaise, Gerard Vergne, Sylvaine Hours