Patents by Inventor Andre Rio

Andre Rio 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).

  • Redox resin process
    Patent number: 3976571
    Abstract: A redox resin capable of removing reducible metal ions effectively from aqueous solutions is described. This resin is obtained by polycondensation of a mixture of formaldehyde, pyrocatechol and an aromatic amine.
    Type: Grant
    Filed: October 23, 1974
    Date of Patent: August 24, 1976
    Assignee: Rhone-Poulenc S.A.
    Inventor: Andre Rio