Patents by Inventor Claudine Biver

Claudine Biver 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 reducing the concentration of multivalent cations in aqueous solutions
    Patent number: 5885462
    Abstract: The process consists in passing the liquid to be purified and a superabsorbent, preferably of polyacrylic type, through a column, the upward speed of the liquid being chosen such that, in the column, the superabsorbent which is merely swollen is in a stationary dynamics regime, whereas the superabsorbent laden with polyvalent ions settles at the bottom of the column. Application to the treatment of the aqueous rinses of articles which have undergone a nickel-plating treatment.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: March 23, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Claudine Biver, Jean-Pierre Cuer, Francois Delmas, Francois Garcia