Patents by Inventor Ian Richard Harris

Ian Richard Harris 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).

  • Tobacco-smoke filters
    Patent number: 4033361
    Abstract: A tobacco-smoke filter contains, as adsorbent for volatile tobacco-smoke constituents, a macroporous amine-type anion-exchange resin which contains substantially primary amino groups only, for instance a cross-linked polyvinyl aromatic compound such as polystyrene cross-linked with divinyl benzene. Advantageously the resin is used in particulate form between fibrous, filamentary or paper filter sections or dispersed in tow. The resin may be half-neutralised with acetic acid or admixed with solid acid.
    Type: Grant
    Filed: June 11, 1975
    Date of Patent: July 5, 1977
    Assignee: Brown & Williamson Tobacco Corporation
    Inventors: Henry George Horsewell, Ian Richard Harris