Patents by Inventor Marie-Françoise Armand

Marie-Françoise Armand 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).

  • Irreversible optical recording medium
    Publication number: 20030090991
    Abstract: The medium comprises a bilayer stack constituted of an inorganic layer (30) and a semi-reflecting layer (32). The inorganic layer (30) can be deformed under the effect of light radiation (34) passed through the semi-reflecting layer, which lowers the reflection coefficient of the stack.
    Type: Application
    Filed: November 5, 2002
    Publication date: May 15, 2003
    Inventors: Ludovic Poupinet, Bernard Bechevet, Marie-Francoise Armand, Robin Perrier, Olivier Fallou
  • Garnet-type magnetic material high faraday rotation magnetic film containing such a material and process for the production thereof
    Patent number: 4698281
    Abstract: The invention relates to a magnetic material containing either one or more rare earth elements, chosen from among lutetium, thulium and ytterbium, or yttrium. It also relates to a magnetic film with a high Faraday rotation constituted by a substrate coated with an epitactic layer of a magnetic material of the aforementioned type.The process for the production of such a magnetic film involves the deposition of a garnet film by liquid phase epitaxy on a substrate, use being made of an epitaxy bath containing gadolinium oxide, praseodymium oxide, and at least one oxide of a metal M, bismuth oxide, iron oxide, gallium oxide and/or aluminium oxide and a solvent incorporating lead oxide and boron oxide.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: October 6, 1987
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Marie-Francoise Armand, Jacques Daval, Bernard Ferrand, Hubert Moriceau