Patents by Inventor Byron E. Johnston

Byron E. Johnston 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).

  • Phosphorus acid catalyst for preparation of 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphospha spiro (5,5) undecane
    Patent number: 4476064
    Abstract: There is provided a process for reacting pentaerythritol with a trivalent phosphorus trihalide conducted in the presence of a phosphorus acid catalyst such as methyl acid phosphate. The reaction product is a useful intermediate for the preparation of flame retardants.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: October 9, 1984
    Assignee: Mobil Oil Corporation
    Inventors: Byron E. Johnston, Roger P. Napier
  • Process for removal of residual organic matter from purified phosphoric acid
    Patent number: 4457899
    Abstract: This invention provides a process for removal of residual organic matter from wet process phosphoric acid purified by solvent extraction with a volatile solvent that comprises contacting said purified phosphoric acid with hydrogen peroxide at a temperature between about 100.degree. C. and about 150.degree. C., for between 1/4 hour and about 4 hours, and using a weight ratio of hydrogen peroxide to phosphoric acid between about 0.001 and about 0.05.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: July 3, 1984
    Assignee: Mobil Oil Corporation
    Inventors: Richard G. Grotyohann, Byron E. Johnston, Robin Schlinger
  • Process for the preparation of dialkyl phosphoric acids
    Patent number: 4288392
    Abstract: This application is directed to a process for preparing dialkyl phosphoric acid, preferably di(2-ethylhexyl) phosphoric acid. This latter material is used in uranium extraction from wet-process phosphoric acid as a kerosine solution along with a synergist, trioctylphosphine oxide.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: September 8, 1981
    Assignee: Mobil Oil Corporation
    Inventors: James M. Horn, Byron E. Johnston, Roger P. Napier, Thomas N. Williams