Patents by Inventor Roy D. Bowden

Roy D. Bowden 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).

  • Preparation of organic pentafluorosulphur compounds
    Patent number: 5741935
    Abstract: A process for the preparation of organic pentafluorosulphur compounds which comprises reacting an organic disulphide in a substantially inert solvent with elemental fluorine.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: April 21, 1998
    Assignee: British Nuclear Fuels plc
    Inventors: Roy D. Bowden, Martin P. Greenhall, John S. Moilliet, Julie Thomson
  • Chemical process
    Patent number: 4638091
    Abstract: A method for the preparation of a fluorinated amine of the formula: ##STR1## wherein X represents hydrogen or fluorine, R represents hydrogen, lower alkyl, difluoromethyl or trifluoromethyl and each of R.sup.1 and R.sup.2, independently, represents hydrogen or lower alkyl, which comprises reacting a carbonyl compound of the formula:XCF.sub.2 CORat an elevated temperature with a nitrogenous base of the formula: ##STR2## and hydrogen in the presence of a hydrogenation catalyst.
    Type: Grant
    Filed: February 11, 1985
    Date of Patent: January 20, 1987
    Assignee: Imperial Chemical Industries PLC
    Inventor: Roy D. Bowden
  • Preparation of aromatic fluoro-compounds
    Patent number: 4263458
    Abstract: 4,4'-difluoro-benzophenone is prepared from 4,4'-diamino-diphenylmethane by diazotization in anhydrous or concentrated aqueous hydrogen fluoride and decomposition of the diazonium fluoride thus produced in the presence of nitrous acid or nitrite as oxidizing agent.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: April 21, 1981
    Assignee: Imperial Chemical Industries Limited
    Inventors: Roy D. Bowden, Leslie Burgess, Raymond J. Clark
  • Chlorination process
    Patent number: 4205175
    Abstract: Partially-chlorinated derivatives of 3-methylpyridine, containing a single chlorine atom as substituent in the pyridine ring and either two or three chlorine atoms as substituents in the methyl group, are prepared by vapor-phase chlorination of 3-methylpyridine.
    Type: Grant
    Filed: February 7, 1979
    Date of Patent: May 27, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventors: Roy D. Bowden, Thomas Seaton