Patents by Inventor Gehard Wagenblast

Gehard Wagenblast 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).

  • Patent number: 5418555
    Abstract: In a novel process for the reversible or irreversible production of an image by the imagewise action of energy on a recording layer, resulting in a pattern of surface charges which corresponds to the imagewise action of the energy, on the surface of the recording layer, the recording layer used is one which contains or consists of an organic material which solidifies in glassy form, is nonphotoconductive or only slightly photoconductive and has permanent dipoles, wherein the pattern of surface charges is produced, without or almost without formation of free charge carriers, by reversible imagewise orientation of some or all of the permanent dipoles present in the recording layer, with the aid of an electric field applied imagewise.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: May 23, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Volker Bach, Karl-Heinz Etzbach, Harald Fuchs, Karl Siemensmeyer, Gehard Wagenblast