Patents by Inventor Dieter Stahl

Dieter Stahl 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).

  • Sheet-like sandwich molding
    Patent number: 5599606
    Abstract: A sheet-like sandwich molding having two outer rigid covering layers and, as the core, at least one sheet-like structure of fiber material, which has been deformed by deep-drawing and been provided with synthetic resin. The sheet-like structure of fiber material, constituting the core, can, for example, be a knitted fabric provided with a curable condensation resin.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: February 4, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Disselbeck, Dieter Stahl
  • Sheet-like sandwich molding
    Patent number: 4631221
    Abstract: A sheet-like sandwich molding having two outer firm rigid covering layers and, as the core, at least one sheet-like structure of fiber material, which has been deformed by deep-drawing and been provided with synthetic resin. The sheet-like structure of fiber material, constituting the core, can, for example, be a knitted fabric provided with a curable condensation resin.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: December 23, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Disselbeck, Dieter Stahl
  • Dimensionally stable composite material and process for the manufacture thereof
    Patent number: 4389447
    Abstract: The dimensionally stable composite material consists of a double fabric with spacer filaments. On both sides of the double fabric there is a plastics layers. Face and back fabric of the double fabric are linked with each other by means of incorporated rigid filaments which prevent the double fabric to be squeezed. The exterior plastics layers are curable laminates. FIG. 1 shows such a composite material.The material is obtained by applying fiber mats impregnated with curable synthetic resins to both sides of the double fabric containing spacer filaments, and subsequently bonding fiber mats and double fabric by compression.
    Type: Grant
    Filed: January 12, 1982
    Date of Patent: June 21, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Disselbeck, Dieter Stahl
  • Process for preparing foamed gypsum and constructional elements composed thereof
    Patent number: 4153470
    Abstract: Foamed gypsum is produced by mixing gypsum with water in the presence of additives serving for liquefying the gypsum and for adjusting the starting period, and by adding thereto a mixture of isocyanate compounds and polyurethane preadducts.After a starting period of about five minutes a foaming process occurs, which is completed after about 20 minutes and furnishes a foamed gypsum after setting. The foamed gypsum has a density from 0.45 to 0.8 g/cc, whereas unfoamed gypsum has a density of 1.66 g/cc.The process may be performed in special molds, so that after setting specially formed elements are obtained, e.g. sandwich elements.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: May 8, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Stahl, Ernst Puchel