Patents by Inventor Stanley C. Rhoads

Stanley C. Rhoads 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 recovering Ni (II), Cu (II) and Co (II) from an ammoniacal-ammonium sulfate leach liquor
    Patent number: 4258016
    Abstract: There is disclosed a process for recovering nickel (II), copper (II) and cobalt (II) from an ammoniacal-ammonium sulfate leach liquor. This process includes the step of adjusting the pH of the leach liquor prior to co-extracting the nickel and the copper values. Cobalt is recovered as cobalt (II) by reduction of cobalt (III) to cobalt (II) following by an extraction step.
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: March 24, 1981
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Richard E. Siemens, David Nilsen, Stanley C. Rhoads
  • Recovery of organic and aqueous phases from solvent extraction emulsions
    Patent number: 4231866
    Abstract: Organic and aqueous phases are separated from solvent extraction emulsions by treatment of the emulsions with diatomaceous earth at elevated temperature, whereby the emulsion-forming matter is sorbed by the diatomaceous earth.
    Type: Grant
    Filed: August 24, 1978
    Date of Patent: November 4, 1980
    Assignee: The Unites States of America as represented by the Secretary of the Interior
    Inventors: Kenneth W. Moser, Richard E. Siemens, Stanley C. Rhoads