Patents by Inventor Ian S. Biggin

Ian S. Biggin 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: 5114600
    Abstract: This invention relates to fabric conditioning formulations containing as thickeners a cross-linked cationic polymer of an ethylenically unsaturated monomer or blend of monomers, wherein the cross-linking agent is 5-45 ppm of a cross-linking agent comprising polyethylenic functions. An example of such a cross-linking agent is methylene bisacrylamide. Such thickeners do not contribute to the opacity of the formulations and have a relatively good viscosity stability.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: May 19, 1992
    Assignee: BP Chemicals Limited
    Inventors: Ian S. Biggin, Peter S. Cartwright, David Farrar, Malcolm Hawe, Walter E. Paget
  • Patent number: 5081195
    Abstract: This invention relates to a process for hydrolysing polymeric amides with a hydrolysing agent at elevated temperatures under the influence of ultrasound in a homogeneous reaction medium. The reaction is particularly suited to the production of polyacrylic acid from polyacrylamide.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: January 14, 1992
    Assignee: BP Chemicals Limited
    Inventors: Martin P. Atkins, Ian S. Biggin, David A. Kidd
  • Patent number: 4379000
    Abstract: A plastisol composition comprising a mixture of a butyl phthalate and an alkyl benzene in a volume ratio between 90:10 and 40:60 is used, for example, to make conventional plastisol coating formulations. The butyl phthalate is preferably di-isobutyl phthalate and the alkyl benzene can be, for example, dodecyl benzene.
    Type: Grant
    Filed: January 16, 1981
    Date of Patent: April 5, 1983
    Assignee: BP Chemicals Limited
    Inventors: Ian S. Biggin, Alan S. Wilson