Patents by Inventor Manfred Kliemann

Manfred Kliemann 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 production of lightfast phase holograms utilizing ammonium dichromate and gelatin as photosensitive recording material
    Patent number: 4029507
    Abstract: Hardenable gelatine recording materials are used in a process for the production of lightfast phase halograms. The recording material is hardened by the exposure to light and sensitized with ammonium dichromate. After exposure, it is developed, dehydrated and hardened. Development is carried out in a desensitizing bath containing formaldehyde sulphite and is followed by hardening in a formalin solution. Dehydration is carried out in two successive stages. In the first stage, the material is treated with an aqueous isopropanol solution and in the second stage with a concentrated isopropanol solution to which formaldehyde is added.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: June 14, 1977
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Hans Wehner, Manfred Kliemann