Patents by Inventor Duncan J. MacQuarrie

Duncan J. MacQuarrie 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 oxidation of cyclohexanone to &egr;-caprolactone
    Patent number: 6531615
    Abstract: This invention relates to a composition comprising antimony trifluoride and silica, a method for the preparation of said composition and use of said composition as a catalyst in a process for the oxidation of cyclohexanone to &egr;-caprolactone.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: March 11, 2003
    Assignee: Solvay (Societe Anonyme)
    Inventors: Michael C. Rocca, Graham Carr, Arnold B. Lambert, Duncan J. MacQuarrie, James H. Clark
  • Composition comprising antimony trifluoride and silica
    Publication number: 20010018399
    Abstract: This invention relates to a composition comprising antimony trifluoride and silica, a method for the preparation of said composition and use of said composition as a catalyst.
    Type: Application
    Filed: January 30, 2001
    Publication date: August 30, 2001
    Inventors: Michael C. Rocca, Graham Carr, Arnold B. Lambert, Duncan J. MacQuarrie, James H. Clark
  • Process for inhibiting scale using maleic anhydride polymerized in reactive aromatic hydrocarbons
    Patent number: 5156744
    Abstract: Polymaleic anhydride having a weight average molecular weight by gel permeation chromatography of between 450 and 800 and a polydispersivity of between 1.0 and 1.15 is produced by polymerizing maleic anhydride, using a peroxide initiator in an amount not greater than 10% by weight of the anhydride, in a dilute solution in o-xylene or a substituted o-xylene.
    Type: Grant
    Filed: September 26, 1991
    Date of Patent: October 20, 1992
    Assignee: FMC Corporation
    Inventors: Jan Rideout, Duncan J. MacQuarrie
  • Polymerization of maleic anhydride
    Patent number: 5077364
    Abstract: Polymaleic anhydride having a weight average molecular weight by gel permeation chromatography of between 450 and 800 and a polydispersivity of between 1.0 and 1.15 is produced by polymerizing maleic anhydride, using a peroxide initiator in an amount not greater than 10% by weight of the anhydride, in a dilute solution in o-xylene or a substituted o-xylene.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: December 31, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Jan Rideout, Duncan J. MacQuarrie