Patents by Inventor Gertrude P. P. Fleischeuer-Nelissen

Gertrude P. P. Fleischeuer-Nelissen 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 the production of a porous film having high bursting strength
    Patent number: 5525694
    Abstract: Process for the production of a film having improved bursting strength by applying a recessed line pattern to a porous film produced from a solution of polyethene and from which the solvent has been removed, at a temperature below the melting point of the polyethene, and subsequently stretching the film biaxially with a degree of stretching of at least 2 x in each of the two directions, the surface area of the film increasing by at least a factor 8, and a porous film having high bursting strength.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: June 11, 1996
    Assignee: DSM N..V
    Inventors: Henricus M. Fortuin, Gertrude P. P. Fleischeuer-Nelissen