Patents by Inventor Jan Frans Hernalsteen

Jan Frans Hernalsteen 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).

  • Polyols
    Patent number: 5767324
    Abstract: Process for reducing the level of unsaturation in a polyether polyol having an oxypropylene content of at least 30% by weight calculated on the total amount of oxyalkylene units in the polyol and having a number average equivalent weight of at least 1000 by subjecting the polyol to ultrafiltration.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: June 16, 1998
    Assignee: Imperial Chemical Industries PLC
    Inventors: Pierre Gilbert Henri Jean Chaffanjon, Minh Son Le, Robert Henry Carr, Howard Matthew Colquhoun, Jan Frans Hernalsteen, Julien Armand Devos