Patents by Inventor D. R. Nagarai

D. R. Nagarai 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).

  • Method of depressing non-sulfide silicate gangue minerals
    Patent number: 5507395
    Abstract: A method for the depression of non-sulfide, silicate gangue minerals is provided wherein the depressant is a graft polymer of polyvinyl alcohol and an acrylamide.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 16, 1996
    Assignee: Cytec Technology Corp.
    Inventors: Samuel S. Wang, D. R. Nagarai
  • Novel collectors and processes for making and using same
    Patent number: 4929343
    Abstract: A method for the production of alkyl or alkaryl hydroxamic acids and/or salts wherein a C.sub.8 -C.sub.22 alcohol is employed with water as the solvent is disclosed as well as the resultant salt and/or acid solutions per se and their use in the flotation of non-sulfide minerals, preferably clay.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: May 29, 1990
    Assignee: American Cyanamid Company
    Inventors: Samuel S. Wang, D. R. Nagarai