Patents by Inventor Dieter Hagen

Dieter Hagen 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).

  • Mercury lamp for promoting plant growth
    Patent number: 4210839
    Abstract: There is disclosed a mercury lamp which has been found to markedly increase plant growth. The electrodes in a conventional mercury lamp are coated with an "emission material" for extending lamp life and to facilitate starting. In accordance with the invention, the mineral scheelite is added to the emission material, and some additional changes are made in the other constituents.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: July 1, 1980
    Assignee: Westron of Canada Limited
    Inventor: Dieter Hagen