Patents by Inventor Hans-Jurgen Kuhlwein

Hans-Jurgen Kuhlwein 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).

  • Nonwoven textile sponge for medicine and hygiene, and methods for the production thereof
    Patent number: 4731277
    Abstract: Disclosed is a nonwoven, textile sponge for use in medical and hygienic applications consisting of at least one outer, thermally consolidated, moisture-repellent fiber layer containing at least 80% synthetic heterofil filaments and at least one layer of absorbent fibers. The sponge is perforated, but does not have any substantial fiber entanglement, and contains no binding agent of any kind. Also disclosed is a method for the manufacture of the sponge, in which the fiber nonwovens are laid one on the other, hydraulically perforated without fiber entanglement, and then thermally consolidated through heterofil filaments.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: March 15, 1988
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Groitzsch, Hans-Jurgen Kuhlwein