Patents by Inventor Jean-Luc Le Loarer

Jean-Luc Le Loarer 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 obtaining a ceric oxide
    Patent number: 5023070
    Abstract: The present invention concerns a process for obtaining a ceric oxide, and, more precisely, a process for increasing and stabilizing at high temperature the specific surface area of a ceric oxide. The invention process, which consists of the preparation of a ceric oxide by calcination of a ceric hydroxide, is characterized by the fact that the ceric hydroxide is subjected to solvothermal treatment before calcination.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: June 11, 1991
    Assignee: Rhone-Poulenc Chimie
    Inventor: Jean-Luc Le Loarer
  • Morphologically improved rare earth trifluorides
    Patent number: 5013534
    Abstract: Morphologically improved, aggregated, monodispersed rare earth trifluoride particulates having a controlled and narrow grain size distribution, and a mean diameter of less than 1 .mu.m, are prepared by (i) reacting an aqueous solution of a rare earth salt with a solution of ammonium fluoride, (ii) separating the precipitate thus formed, and (iii) heat treating the separated precipitate.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: May 7, 1991
    Assignee: Rhone-Poulenc Chimie
    Inventors: Antoine Dissaux, Jean-Luc Le Loarer
  • Ceric oxide with new morphological characteristics and method for obtaining same
    Patent number: 5011671
    Abstract: The object of the present invention is a ceric oxide with new morphological characteristics. The invention also relates to one of the methods for obtaining said oxide.The method of the invention is characterized by the fact that a ceric hydroxide, prepared by base precipitation using a solution of a cerium salt, undergoes a solvo-thermal treatment before the calcination operation.The ceric oxide obtained has a large specific surface at high temperatures.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: April 30, 1991
    Assignee: Rhone-Poulenc Chimie
    Inventor: Jean-Luc Le Loarer
  • Process for obtaining ceric oxide
    Patent number: 5002747
    Abstract: The present invention concerns a process for obtaining a ceric oxide having a large specific surface area.The process according to the invention consists of subjecting a ceric hydroxide prepared by hydrolysis of a cerium IV salt solution, to solvothermal treatment prior to calcination.The ceric oxide thus obtained has a large specific surface area at high temperature.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: March 26, 1991
    Assignee: Rhone-Poulenc Chimie
    Inventor: Jean-Luc Le Loarer