Patents by Inventor Hans-Dieter Greif

Hans-Dieter Greif 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).

  • Solar energy collector panel
    Patent number: 4332241
    Abstract: The panel includes two thermally prestressed silicate glass plates with metalized edges to which are solder-sealed lead bars which, in turn, are solder-sealed to a tubular frame. An outer protection frame covers the plate edges. Spacer posts and elements support the plates against pressure upon evacuation. The absorber proper is centrally disposed in the evacuated chamber.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: June 1, 1982
    Assignee: Erno Raumfahrttechnik GmbH
    Inventors: Rolf Dalstein, Johann Spies, Hans-Dieter Greif, Gunter Termath, Jurgen Unbescheid, Hans-Werner Nowoczyn