Patents by Inventor Nelly Keller

Nelly Keller 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 the preparation of metal fluorides usable for the production of fluoride glasses
    Patent number: 4857294
    Abstract: A process for the preparation of metal fluorides usable for the production of fluoride glasses consists of reacting in an organic liquid medium, such as toluene, (a) a compound of said metal chosen from among the gaseous compounds thereof, the compounds of said metal soluble in the organic liquid medium and the compounds of said metal in solution in an organic solvent miscible with said medium, and (b) a fluorinating agent chosen from among the gaseous fluorinating agents, the fluorinating agents which are partly soluble in the organic medium and the fluorinating agents which are partly soluble in an organic solvent miscible with said medium, to form a fluoride of said metal, the organic liquid medium being such that it reacts neither with the compound of the metal, nor with the fluorinating agent and does not dissolve the fluoride formed. To prepare the zirconium tetrafluoride, it is possible to introduce in toluene, gaseous Zr(BH.sub.4).sub.
    Type: Grant
    Filed: July 22, 1987
    Date of Patent: August 15, 1989
    Assignee: Commissariat A L'Energie Atomique
    Inventors: Martine Bridenne Alaux, Hubert Marquet-Ellis, Nelly Keller, Gerard Folcher, deceased