Patents by Inventor Martin Leonard Heijnen

Martin Leonard Heijnen 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).

  • Membrane which comprises a blend of a polysulphone or a polyether sulphone and polyethylene oxide/polypropylene oxide substituted ethylene diamine
    Patent number: 6495043
    Abstract: A membrane which can be used in membrane filtration processes and which has a reduced tendency to fouling is a polysulphone or a plyether sulphone and a polyethylene oxide/polypropylene oxide substituted diamine and can be made by a phase inversion process in the presence of pore modifying agents such as an alcohol, glycerol or glycol to give a membrane which has a pore size of 0.1&mgr; to 1 micron and is hydrophilic.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: December 17, 2002
    Assignee: Kalsep Limited
    Inventor: Martin Leonard Heijnen