Patents by Inventor Justin Mark Cowan

Justin Mark Cowan 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).

  • Solvent systems
    Patent number: 6878846
    Abstract: In a method for making bisphosphonates by reacting a carbonyl compound with a phosphorus halide, the reaction is carried out in a solvent/carrier system which is a mixture of an amine hydrochloride, phosphorous acid and optionally phosphoric acid.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: April 12, 2005
    Assignee: Rhodia Consumer Specialties Ltd.
    Inventors: Justin Mark Cowan, Christopher John Harris, Michael John Harrison
  • Production of aromatic phosphites
    Patent number: 6586614
    Abstract: A method for the production of an aromatic phosphite by reacting an aromatic hydroxy-compound with a phosphorus trihalide in the presence of a tertiary amine and a non-protic solvent, said solvent being mobile below −20° C. Suitable tertiary amines include tri-propyl amines, tri-butyl amines, tri-n-propylamine, tri-iso-propylamine, tri-n-butylamine, tri-iso-butylamine and tri-t-butylamine.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: July 1, 2003
    Assignee: Rhodia Consumer Specialties Limited
    Inventor: Justin Mark Cowan
  • Solvent systems
    Publication number: 20030013918
    Abstract: In a method for making bisphosphonates by reacting a carbonyl compound with a phosphorus halide, the reaction is carried out in a solvent/carrier system which is a mixture of an amine hydrochloride, phosphorous acid and optionally phosphoric acid.
    Type: Application
    Filed: June 21, 2002
    Publication date: January 16, 2003
    Applicant: RHODIA CONSUMER SPECIALTIES LIMITED
    Inventors: Justin Mark Cowan, Christopher John Harris, Michael John Harrison
  • Production of aromatic phosphites
    Publication number: 20020120162
    Abstract: A method for the production of an aromatic phosphite by reacting an aromatic hydroxy-compound with a phosphorus trihalide in the presence of a tertiary amine and a non-protic solvent, said solvent being mobile below −20° C. Suitable tertiary amines include tri-propyl amines, tri-butyl amines, tri-n-propylamine, tri-iso-propylamine, tri-n-butylamine, tri-isobutylamine and tri-t-butylamine.
    Type: Application
    Filed: February 22, 2002
    Publication date: August 29, 2002
    Applicant: RHODIA CONSUMER SPECIALTIES LIMITED
    Inventor: Justin Mark Cowan