Patents by Inventor Robert Harry Edwards

Robert Harry Edwards 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).

  • Ether phosphoric acid compound
    Patent number: 4093662
    Abstract: A solid anhydrous crystalline compound of the formula H.sub.3 PO.sub.4 [(CH.sub.3).sub.2 CH].sub.2 O. The invention also provides a method of preparing phosphoric acid by evaporating diisopropyl ether off said anhydrous crystalline compound under reduced pressure.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: June 6, 1978
    Assignee: Albright & Wilson Limited
    Inventors: Robert Harry Edwards, Thomas Alan Williams, Kenneth Hall
  • Phosphoric acid purification
    Patent number: 3947499
    Abstract: A solid anhydrous 1:1 molar compound of phosphoric acid and diisopropyl ether is prepared from a mixture of the ether and phosphoric acid in a molar ratio (R:1) of 0.6:1 to 1.4:1 at a temperature at least as low as the crystallization temperature (T.degree.C) governed by the relationship T = 25(1.2-R). Treatment of the compound with water or a base produces purified acid or a phosphate respectively.
    Type: Grant
    Filed: January 30, 1974
    Date of Patent: March 30, 1976
    Assignee: Albright & Wilson Limited
    Inventors: Robert Harry Edwards, Thomas Alan Williams, Kenneth Hall