Patents by Inventor Nigel Hayman

Nigel Hayman 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).

  • Method of producing porous hollow fibrous tubes
    Patent number: 5096640
    Abstract: A method of producing a highly porous melt spun fibrous tube for use as a separation medium comprising melt spinning a blend containing from 30 to 70 parts by weight of a first polymeric component and from 70 to 30 parts by weight of a second polymeric component to form a tube having a wall consisting of interpenetrating networks of the two polymeric components and, using a suitable solvent, leaching out of the tube wall one of the two polymer networks so producing a tube having a wall comprising the other polymer network.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: March 17, 1992
    Assignee: Imperial Chemical Industries PLC
    Inventors: Harry Brody, Colin Dewar, Nigel Hayman