Patents by Inventor Stephen V. Norval

Stephen V. Norval 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).

  • Patent number: 4356159
    Abstract: A method for the recovery of the bromine content of methyl bromide as bromine or hydrogen bromide comprises oxidizing the methyl bromide over a noble metal catalyst. The production of hydrogen bromide is favored by the inclusion of a source of hydrogen.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: October 26, 1982
    Assignee: Imperial Chemical Industries Limited
    Inventors: Stephen V. Norval, Peter J. V. Jones
  • Patent number: 4323699
    Abstract: Oxidation of a substituted aromatic compound e.g. p-xylene to an aromatic carboxylic acid e.g. tere-phthalic acid using a heavy metal/bromine catalyst in an aqueous reaction medium in the presence of an iodine promoter.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: April 6, 1982
    Assignee: Imperial Chemical Industries Limited
    Inventor: Stephen V. Norval