Patents by Inventor Robert J. Pryce

Robert J. Pryce 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).

  • Process for the preparation of difluorobenzamide
    Patent number: 5206158
    Abstract: The invention provides a process for the preparation of 2,6-difluorobenzamide which comprises subjecting 2,6-difluorobenzonitrile to the action of a suitable hydrolysing microorganism or nitrilase extract therefrom; and Rhodococcus Sp. NCIB 12218 or a mutant thereof, suitable for use in the process.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: April 27, 1993
    Assignees: Gist-Brocades N.V., Shell Internationale Research Maatschappij B.V.
    Inventors: Kenneth H. Clifford, Philip J. Geary, Robert J. Pryce
  • Process for preparing 1,3-dioxolane ketones
    Patent number: 5110957
    Abstract: A process for preparing a ketone of the general formula: ##STR1## in which R.sup.1 and R.sup.2 each independently represent a C.sub.1-6 alkyl or C.sub.6-12 aryl group, and R represents an alkyl, aryl, aralkyl, heterocyclic or carboxylic group, which process comprises reacting a carboxylic acid having the general formula I in which R represents a hydroxy group with a lithium compound to form the corresponding lithium salt of the carboxylic acid; reacting the lithium salt so-obtained with thionyl chloride to yield an acyl chloride having the general formula I in which R represents a chlorine atom; reacting the acyl chloride so-obtained with a secondary amine to yield an amide having general formula I in which R represents a secondary amino group; and reacting the amide so-obtained with an organometallic reagent to yield the ketone having general formula I.
    Type: Grant
    Filed: August 17, 1990
    Date of Patent: May 5, 1992
    Assignee: Shell Research Limited
    Inventors: Robert J. Pryce, John E. Hawes, Sheetal Handa
  • Wild oat herbicide mixture
    Patent number: 4047928
    Abstract: A selective wild oat herbicide composition comprising as active ingredient, a N,N-disubstituted alanine derivative and as a synergist, a methylenedioxyphenyl polyglycol ether.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: September 13, 1977
    Assignee: Shell Oil Company
    Inventors: Richard P. M. Bond, Robert J. Pryce, Clive A. Raven, Michael A. J. Venis