Patents by Inventor Rolf-Peter Schwobel

Rolf-Peter Schwobel 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).

  • Hydrophilized separator material of nonwoven fabric for electrochemical cells and a method for its production
    Patent number: 5401594
    Abstract: The subject invention relates to a hydrophilized separator material of nonwoven fabric that is useful for electrochemical cells having an aqueous alkaline electrolyte. The nonwoven fabric comprises a mixture of lower-melting and higher-melting polyamide and/or polyolefin fibers that are compressed together in a sealed manner by softening the lower-melting fiber portions with pressure and heat. The separator material is hydrophilized by moistening it with 0.5 to 7% by weight, with respect to the dry weight of the nonwoven fabric, of deionized water. The subject invention further relates to the method for hydrophilizing the nonwoven fabric.
    Type: Grant
    Filed: October 5, 1993
    Date of Patent: March 28, 1995
    Assignee: Firma Carl Freudenberg
    Inventors: Rolf-Peter Schwobel, Harald Hoffmann