Patents by Inventor Gerd Esswein

Gerd Esswein 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).

  • Preparation of pigmented curable polyester molding compounds
    Patent number: 5094797
    Abstract: Pigmented curable polyester molding compounds which cure to give homogeneously colored moldings contain an unsaturated polyester, copolymerizable monomers, a thermoplastic polymer and a color pigment and are prepared by dispersing the pigment in the molten thermoplastic in an extruder.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: March 10, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Heel, Jan Holoch, Gerd Esswein, Friedrich Goffing
  • Tissue-compatible medical device and method for manufacturing the same
    Patent number: 4973320
    Abstract: A medical device which can be introduced into the body tissue of a human or animal comprises a matrix of a polyurethane elastomer with organic silicone polymer units built into the main polymer chain and an oligodynamic agent spatially distributed uniformly within the matrix. The oligodynamic agent releases bacteriocidal or microbicidal metal ions when exposed to body tissues. The method for manufacturing the medical device is characterized by the addition of the oligodynamic agent in a solid or dissolved form prior to the reaction of the educts with isocyanate.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: November 27, 1990
    Assignee: Firma Carl Freudenberg
    Inventors: Otto Brenner, Wolfgang Ermert, Helmut Eschwey, Gerd Esswein, Gunter Schuhmacher