Patents by Inventor Ralph J. Chamberlain

Ralph J. Chamberlain 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).

  • Anionic polymeric flocculant combinations for settling phosphate slimes
    Patent number: 4251363
    Abstract: Phosphate slimes are effectively settled by the sequential addition of effective amounts of a low molecular weight acrylamide: acrylic acid copolymer of high anionicity and a high molecular weight acrylamide: acrylic acid copolymer of low anionicity.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: February 17, 1981
    Assignee: American Cyanamid Company
    Inventors: Ralph J. Chamberlain, Richard E. Ellwanger