Patents by Inventor Andrew Lennard

Andrew Lennard 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).

  • Polymer porous structure and process
    Patent number: 5698105
    Abstract: A reverse osmosis membrane having a support which itself has properties of salt rejection laminated to a layer of a cross-linked polyol. The support is a sulphonated aromatic polyether sulphone, and the polyol ma be polyvinyl alcohol.
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: December 16, 1997
    Assignee: North West Water Group PLC
    Inventors: Howard Matthew Colquhoun, Peter John Williams, Andrew Lennard Lewis