Patents by Inventor Hans F. DeGroot

Hans F. DeGroot 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).

  • An enveloped coiled tampon
    Patent number: 5366450
    Abstract: The invention relates to a tampon for female hygiene having a wound nonwoven fabric core and an envelope with thermoplastic fibers which externally encloses the core, the envelope consisting of a nonwoven fabric which has hydrophilic fibers in addition to the thermoplastic fibers.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: November 22, 1994
    Assignee: SanPoint AB
    Inventor: Hans F. DeGroot