Patents by Inventor Stuart Richard Rigby

Stuart Richard Rigby 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).

  • Production of optically active 2-substituted tetrahydropyran-4-ones
    Patent number: 6680183
    Abstract: Optically active 2-substituted tetrahydropyran-4-ols or esters thereof may be prepared using esterases or hydrolases from the corresponding racemic mixtures of esters or alcohols. This provides a route to the corresponding optically active ketones. The racemic mixtures are preferably in the cis-form. such mixtures may be produced by reacting but-3-ene-1-ol with an aldehyde in the presence of an acid.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: January 20, 2004
    Assignee: Zeneca Limited
    Inventors: Robert Antony Holt, Stuart Richard Rigby, David Waterson
  • Production of optically active 2-substituted tetrahydropyran-4-ones
    Publication number: 20020048797
    Abstract: Optically active 2-substituted tetrahydropyran-4-ols or esters thereof may be prepared using esterases or hydrolases from the corresponding racemic mixtures of esters or alcohols. This provides a route to the corresponding optically active ketones.
    Type: Application
    Filed: June 1, 2001
    Publication date: April 25, 2002
    Applicant: Zeneca Limited
    Inventors: Robert Antony Holt, Stuart Richard Rigby, David Waterson
  • Production of optically active 2-substituted tetrahydropyran-4-ones
    Patent number: 6258574
    Abstract: Optically active 2-substituted tetrahydropyran-4-ols or esters thereof may be prepared using esterases or hydrolases from the corresponding racemic mixtures of esters or alcohols. This provides a route to the corresponding optically active ketones. The racemic mixtures are preferably in the cis-form. such mixtures may be produced by-reacting but-3-ene-1-ol with an aldehyde in the presence of an acid.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: July 10, 2001
    Assignee: Zeneca Limited
    Inventors: Robert Antony Holt, Stuart Richard Rigby, David Waterson
  • Production of optically active 2-substituted tetrahydropyran-4-ones
    Patent number: 5962282
    Abstract: Optically active 2-substituted tetrahydropyran-4-ols or esters thereof may be prepared using esterases or hydrolases from the corresponding racemic mixtures of esters or alcohols. This provides a route to the corresponding optically active ketones.The racemic mixtures are preferably in the cis-form. such mixtures may be produced by reacting but-3-ene-1-ol with an aldehyde in the presence of an acid.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: October 5, 1999
    Inventors: Robert Antony Holt, Stuart Richard Rigby, David Waterson