Patents by Inventor Jean-Francois Baumard

Jean-Francois Baumard 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).

  • Yttrium oxide/titanium oxide ceramic compositions
    Patent number: 5508242
    Abstract: Ceramic compositions based on yttrium oxide contain a minor amount of a titanium oxide and are readily sintered into dense ceramic shaped articles well adopted for metallurgical applications.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: April 16, 1996
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jean-Francois Baumard, Marcel Boncoeur, Gilles Gasgnier, Louis Minjolle
  • Transparent ceramics and production process for the same
    Patent number: 5308809
    Abstract: The present invention relates to a ceramic based on yttrium oxide and titanium oxide. This ceramic has a light transmission percentage of at least 20% in a wavelength range between 0.5 and 8 .mu.m.It also relates to a sintering process for obtaining said ceramic.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: May 3, 1994
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jean-Francois Baumard, Marcel Boncoeur, Gilles Gasgnier, Louis Minjolle
  • Stabilized zirconia powders
    Patent number: 4999182
    Abstract: Sinterable, morphologically and chemically homogeneous stabilized zirconia fine powders, e.g., yttrium-stabilized zirconia powders, are prepared by heat treating aerosol droplets which comprise a mixed precursor solution of at least one inorganic zirconium salt and at least one inorganic salt of a zirconia-stabilizing element, said heat treating including (a) heating the aerosol droplets to a temperature of from 400.degree. to 500.degree. C. for a period of time of from 4 seconds to 2 hours, and thereafter (b) calcining such droplets at a temperature of from 650.degree. to 1,250.degree. C.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: March 12, 1991
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jean-Francois Baumard, Bertrand Dubois, Philippe Odier