Patents by Inventor Martin P. Greenhall

Martin P. Greenhall 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 fluorinated dicarbonyls
    Patent number: 6020502
    Abstract: A method for the fluorination of 1,3-diketones and 1,3-ketoesters is disclosed.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: February 1, 2000
    Assignee: BNFL Fluorochemicals Ltd.
    Inventors: Richard D. Chambers, John Hutchinson, Martin P. Greenhall, John S. Moilliet, Julie Thomson
  • 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
  • Water treatment agent
    Patent number: 5606105
    Abstract: Unsaturated compounds which can be dissolved in aqueous based solvents, such as ethylenic or acetylenic carboxylate or alcohols with less than 10 carbon atoms, especially maleic and/or acrylic acid or propargyl alcohol, are reacted with alkali metal phosphite in aqueous solution at neutral or alkaline pH in the presence of free radical initiators such as persulphate to form threshold scale and corrosion inhibitors.
    Type: Grant
    Filed: August 18, 1994
    Date of Patent: February 25, 1997
    Assignee: Albright & Wilson Limited
    Inventors: Keith P. Davis, Peter A. T. Hoye, Michael J. Williams, Gary Woodward, Martin P. Greenhall
  • Telechelic telomers of chlorotrifluoroethylene
    Patent number: 5481046
    Abstract: Iodine terminated liquid telechelic telomers of chlorotrifluoroethylene (CTFE) containing an average of more than 1 CTFE unit per molecule are novel compounds. The telomers can be prepared by a photochemically initiated reaction between liquified CTFE and either elemental iodine or the telogen ICF.sub.2 CFClI at temperatures below about 50.degree. C.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: January 2, 1996
    Assignee: Dow Corning Corporation
    Inventors: Richard D. Chambers, Martin P. Greenhall, Antony P. Wright
  • Water treatment agent
    Patent number: 5386038
    Abstract: Unsaturated compounds which can be dissolved in aqueous based solvents, such as ethylenic or acetylenic carboxylate or alcohols with less than 10 carbon atoms, especially maleic and/or acrylic acid or propargyl alcohol, are reacted with alkali metal phosphite in aqueous solution at neutral or alkaline pH in the presence of free radical initiators such as persulphate to form threshold scale and corrosion inhibitors.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: January 31, 1995
    Assignee: Albright & Wilson Limited
    Inventors: Keith P. Davis, Peter A. T. Hoye, Michael J. Williams, Gary Woodward, Martin P. Greenhall
  • Telechelic telomers of chlorotrifluoroethylene and method for preparing same
    Patent number: 5262025
    Abstract: Iodine terminated liquid telechelic telomers of chlorotrifluoroethylene (CTFE) containing an average of more than 1 CTFE unit per molecule are novel compounds. The telomers can be prepared by a photochemically initiated reaction between liquified CTFE and either elemental iodine or the telogen ICF.sub.2 CFClI at temperatures below about 50.degree. C.
    Type: Grant
    Filed: August 15, 1991
    Date of Patent: November 16, 1993
    Assignee: Dow Corning Corporation
    Inventors: Richard D. Chambers, Martin P. Greenhall, Antony P. Wright