Patents by Inventor Johannes Berle

Johannes Berle 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).

  • Method for producing an electrophotographic recording material
    Patent number: 4011079
    Abstract: In the fabrication of an electrophotographic recording material of the type composed of selenium, selenium compounds, or alloys with selenium, the method is simplified by initially vapor-depositing the photoconductive recording material onto a carrier at a temperature below the glass transformation temperature, and then heating the recording material to a higher second temperature range between the glass transformation temperature and a temperature just below that at which the electrophotographic properties of the recording material begin to change.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: March 8, 1977
    Assignee: Licentia Patent-Verwaltungs-G.m.b.H.
    Inventors: Johannes Berle, Hartmut Dulken, Gottfried Guder, Karl-Heinz Kassel