Patents by Inventor Sheena Jackson

Sheena Jackson 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 bisphosphines
    Patent number: 7914759
    Abstract: Bisphosphines are prepared by reacting a phosphine with a dihalide in the presence of an acid; characteristically, bisphosphonium compounds are initially formed and then converted into the bisphosphines.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: March 29, 2011
    Assignee: Rhodia UK Limited
    Inventors: Gordon Docherty, Graham Good, Sheena Jackson
  • PRODUCTION OF BISPHOSPHINES
    Publication number: 20100015024
    Abstract: Bisphosphines are prepared by reacting a phosphine with a dihalide in the presence of an acid; characteristically, bisphosphonium compounds are initially formed and then converted into the bisphosphines.
    Type: Application
    Filed: July 20, 2006
    Publication date: January 21, 2010
    Applicant: Rhodia UK Limited
    Inventors: Gordon Docherty, Graham Good, Sheena Jackson
  • Process for preparing phosphorodiamidites
    Publication number: 20060128951
    Abstract: A method of phosphorodiamidite production comprising the steps of reacting a phosphorus trihalide with a dialkyl amine in a polar solvent to form an intermediate compound. This intermediate compound is then subsequently reacted with an hydroxylalkyl compound and a dialkyl amine in the presence of a non-polar co-solvent. Following filtration to remove the solid by-product the two solvents form separate layers. This is advantageous as the upper, non-polar solvent, layer contains the high-purity phosphorodiamidite product.
    Type: Application
    Filed: December 18, 2003
    Publication date: June 15, 2006
    Inventors: Christopher Harris, Sheena Jackson, David Wilson