Patents by Inventor Georges Constant

Georges Constant 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).

  • Process for making bioactive coatings on osseous prostheses, and prostheses thus obtained
    Patent number: 4705694
    Abstract: The present invention relates to a process for making bioactive coatings on osseous prostheses, wherein a mist of particles containing calcium ions and orthophosphate ions is made from solutions and said mist is brought into contact with a substrate (notably an implant) made of inert material under such operational conditions that a hydroxyapatite coating is formed by reaction on the hot surface of said inert substrate, said process being characterized by the fact that the operating conditions to make the deposit are selected so that a liquid film forms on the hot surface of said substrate during the deposition.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: November 10, 1987
    Assignee: Societe Europeenne de Propulsion
    Inventors: Bernard Buttazzoni, Philippe Leseur, Jacques Thebault, Georges Constant, deceased
  • Process for making bioactive coatings on osseous prostheses, and prostheses thus obtained
    Patent number: 4366183
    Abstract: The present invention relates to a process for making bioactive coatings on osseous prostheses, wherein, from solutions, a mist of particles containing calcium ions and orthophosphate ions is made and said mist is brought into contact with an implant made of inert material under such operational conditions that at least one desired calcium phosphate is formed by reaction on the hot surface of said inert implant, and to the osseous implants obtained by this process.
    Type: Grant
    Filed: June 10, 1981
    Date of Patent: December 28, 1982
    Assignee: Societe Europeene de Propulsion
    Inventors: Josette Ghommidh, Bernard Buttazzoni, Georges Constant, Etienne Diloy, Roland Morancho
  • Process for depositing a III-V semi-conductor layer on a substrate
    Patent number: 4250205
    Abstract: A process for depositing a layer of a semiconductor composition comprising elements M(III) and M'(V) selected from group III and group V elements, respectively onto a substrate. The process comprises: contacting the substrate with a coordination compound in the gaseous phase, the compound having the formula: ##STR1## wherein M(III) and M'(V) are bonded to one another by a donor/acceptor bond and wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 are chemical radicals other than hydrogen with at least one of the radicals R.sub.1, R.sub.2, and R.sub.3 being an electron donor serving to stabilize the donor/acceptor bond between elements M(III) and M'(V). The process further comprises decomposing the coordination compound so as to break the chemical bonds between the radicals and the elements M(III) and M'(V) without breaking the donor/acceptor bond, so as to cause the semi-conductor composition to deposit onto the substrate.
    Type: Grant
    Filed: September 12, 1978
    Date of Patent: February 10, 1981
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Georges Constant, Raymond Haran, Albert Lebugle, Aref Zaouk, Roland Morancho, Philippe Pouvreau