Patents by Inventor Michel Postel

Michel Postel 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).

  • Cement for the fixation of osseous prostheses
    Patent number: 4383879
    Abstract: The present invention relates to a cement which may be used for the fixation of osseous prostheses. This cement is obtained by hardening of a mixture comprising:(a) at least one epoxide resin having a high reactivity and a very low toxicity, consisting of a diepoxide of a glycidyl ether of bisphenol A;(b) a reactive, non-toxic suppling resin, consisting preferably of hydroxyl-terminated polybutadiene;(c) a mineral filler in powder form;(d) a hardener capable of reacting with said epoxide resin to effect hardening thereof, and(e) a hardening accelerator.The invention is more particularly applicable to the fixation of hip prostheses.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: May 17, 1983
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Antoine Le Du, Frantz Langlais, Christian Michaud, Michel Postel
  • Curve-generating device for visual display of symbols on a cathode-ray screen
    Patent number: 4314351
    Abstract: The curve-generating device serves in particular to produce signals relating to a circular line from simple algorithms. The device comprises means for computing a parameter .DELTA.L defined by ##EQU1## where U is an elementary vector, .theta. is the angle at the center of a polygon of side U+.DELTA.L circumscribed about the circle R, and processing logic circuits for determining the polar direction P.sub.n of the plotted line according to the relation: ##EQU2## where.DELTA..sub.n-1 =1 in respect of x.sub.n-1 .gtoreq.U andx.sub.n =x.sub.n-1 +.DELTA.L.multidot..DELTA..sub.n-1 -U.multidot..DELTA..sub.n-1.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: February 2, 1982
    Assignee: Thomson-CSF
    Inventors: Michel Postel, Jean-Pierre Bouron
  • Prosthesis for arthroplasty of the hip
    Patent number: 4173797
    Abstract: A hip prosthesis comprising a thin metal cotyloid cup, substantially spherical in form, the dimensions of the outer surface of which are substantially equal to those of a the cotyloid cavity, and which is provided with a peripheral flange for abutting on the bone around the cotyloid cavity and for preventing the cup from pivoting; a thin femoral cup, also made of metal, extended by a skirt and substantially in the form of a finger guard; and a relatively thick intermediate cup made of plastics material, having a spherical outer surface adapted to pivot in the cotyloid cup, and an inner surface comprising a spherical central part extended by a cylindrical portion which fits on the femoral cup so as to allow said latter to move only in rotation about the axis of symmetry of the cups.
    Type: Grant
    Filed: August 17, 1977
    Date of Patent: November 13, 1979
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Frantz Langlais, Michel Postel