Patents by Inventor Jens H. Wendt

Jens H. Wendt 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).

  • Prosthetic denture prepared from polyurethane elastomer
    Patent number: 4281992
    Abstract: A hard, substantially non-hydrophilic polyurethane elastomer denture is disclosed in which the elastomer possesses a hardness of not less than about Shore D60 and preferably not greater than about Shore D100. The polyurethane elastomer is prepared from a polyether polyol and an aromatic polyisocyanate in which the isocyanate groups are bonded directly to the aromatic nucleus. The aforesaid hard non-hydrophilic polyurethane elastomer can constitute the entire material of which the denture is made, including the teeth if so desired, or it can be employed as the tooth-holding portion of the denture in combination with a soft, substantially non-hydrophilic elastomer as the mouth-engaging portion of the denture. The hard non-hydrophilic polyurethane elastomer possesses superior resistance to thermal distortion under the conditions prevailing in the mouth.
    Type: Grant
    Filed: November 23, 1979
    Date of Patent: August 4, 1981
    Assignee: Polythetics, Inc.
    Inventors: Ralph W. Colpitts, Jens H. Wendt
  • Prosthetic denture prepared from polyurethane elastomer
    Patent number: 4225696
    Abstract: A hard, substantially non-hydrophilic polyurethane elastomer denture is disclosed in which the elastomer possesses a hardness of not less than about Shore D60 and preferably not greater than about Shore D100. The polyurethane elastomer is prepared from a polyether polyol and an aromatic polyisocyanate in which the isocyanate groups are bonded directly to the aromatic nucleus. The aforesaid hard non-hydrophilic polyurethane elastomer can constitute the entire material of which the denture is made, including the teeth if so desired, or it can be employed as the tooth-holding portion of the denture in combination with a soft, substantially non-hydrophilic elastomer as the mouth-engaging portion of the denture. The hard non-hydrophilic polyurethane elastomer possesses superior resistance to thermal distortion under the conditions prevailing in the mouth.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: September 30, 1980
    Assignee: Polythetics, Inc.
    Inventors: Ralph W. Colpitts, Jens H. Wendt