Patents by Inventor Iain S. Smith

Iain S. Smith 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).

  • Process for making a composite membrane
    Patent number: 5256503
    Abstract: A composite membrane comprises a first material which defines a porous matrix and a second material blocking the pores of the matrix, the second material having been crosslinked by irradiation, preferably with UV radiation, when in the pores. Preferably a crosslinking agent is mixed with the second material.The porous matrix may be made by leaching a water soluble material from a blend of that material with polyethylene. The second material may be polymerizable, for example an acrylic acid derivative.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: October 26, 1993
    Assignee: Scimat Limited
    Inventors: John A. Cook, Iain S. Smith, Raymond W. Singleton