Patents by Inventor Frederick A. Ridgway

Frederick A. Ridgway 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).

  • Apparatus for preparing red phosphorus
    Patent number: 4229307
    Abstract: Apparatus and method for preparing phosphorus compounds wherein phosphorus vapor containing P.sub.2 molecules is condensed at a temperature below the solidification point of red phosphorus and the resulting solid is then reacted with a phosphorus-reactive material. When the phosphorus-reactive material is water at an elevated temperature, phosphine is produced.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: October 21, 1980
    Assignee: Hooker Chemicals & Plastics Corp.
    Inventors: Edward J. Lowe, Frederick A. Ridgway