Patents by Inventor Michel Devalette

Michel Devalette 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).

  • Particulate compositions of rare earth oxide and method of making same
    Patent number: 5006318
    Abstract: Particulate compositions of rare earth oxides wherein the particles are present in the form of single crystals of homogeneous size and morphology, the dimensions of which are less than or equal to 10 .mu.m and greater than approximately 0.05 .mu.m and that at least 80% of the particles have dimensions varying within a range of x.+-.0.2 x, x being the mean dimension of the particles of the composition under consideration, with the understanding that the variation of the range of .+-.0.2 x is not less than .+-.0.1 .mu.m.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: April 9, 1991
    Assignee: Rhone-Poulenc Chimie
    Inventors: Gerard Demazeau, Olivier Martel, Michel Devalette, Eric Verdon