Patents by Inventor John Peter Turnbull

John Peter Turnbull 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).

  • Chemical process for preparing an optically active aminodiol
    Patent number: 5659075
    Abstract: A process is claimed for preparing [1S(1(.alpha., 2.beta., 4.beta.)]-4-amino-2-hydroxymethyl -1-cyclopentanol from cis-4-((R)-benzoylamino)-2-cyclopentenecarboxylic acid, methyl ester in five steps. The invention also describes a number of novel intermediates useful in the synthesis of [1S(1.alpha., 2.beta.,4.beta.)]-4-amino-2-hydroxymethyl-1-cyclopentanol.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: August 19, 1997
    Assignee: Glaxo Group Limited
    Inventors: Bernard Charles Halter, Clive Alwin Meerholz, Mark Brian Schilling, David Joszef Tapolczay, John Peter Turnbull
  • Process for the preparation of aromatic .alpha.-keto carboxylic acids
    Patent number: 4013680
    Abstract: A process is described for the preparation of aryl .alpha.-keto acids in which the corresponding methyl ketone or aldehyde is oxidized in aqueous solution with an inorganic nitrite salt and hydrochloric or sulfuric acid.
    Type: Grant
    Filed: June 18, 1975
    Date of Patent: March 22, 1977
    Assignee: Glaxo Laboratories Limited
    Inventors: Martin Godfrey Johnson, John Peter Turnbull, Harold Alfred Crisp
  • Process for the preparation of 11-.beta.-nitro-oxysteroids
    Patent number: 3980681
    Abstract: Process for preparing 9 .alpha.-hydroxy-11 .beta.-nitro-oxysteroids having a aromatic ring A wherein an aromatic A-ring-containing 9, 11-unsubstituted steroid or corresponding 9,11-dehydrosteroid is oxidized with ceric ions in the presence of nitrate ions.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: September 14, 1976
    Inventors: Peter Job Sykes, Gordon Hanley Phillipps, Stuart Bruce Laing, John Peter Turnbull