Patents by Inventor Gunter Luttgens

Gunter Luttgens 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).

  • Process for the improvement of the adhesion of photographic layers to a film web by means of a corona treatment
    Patent number: 4055685
    Abstract: Corona treatment involves the continuous subjection of the film web to a steady alternating current discharge. This treatment is carried out in two consecutive stages, the corona discharge frequency f.sub.1 in the first stage being in the range f.sub.1 = 5 to 100 kHz and the corona discharge frequency f.sub.2 in the second stage being in the range f.sub.2 = 500 to 2000 kHz.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: October 25, 1977
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Gunther Bayer, Hans Georg Fitzky, Herbert Hoyer, Gunter Luttgens, Wolfgang Muller-Bardorff