Patents by Inventor Heinz Meckl

Heinz Meckl 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).

  • Regeneration of spent color developers
    Patent number: 4186007
    Abstract: A new process for the regeneration of spent color developers using both an ion exchanger and certain adsorbents is described. This process preserves the capacity of the exchanger to be regenerated.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: January 29, 1980
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Heinz Meckl, Karl Lohmer
  • Process for the regeneration of photographic bleach-fix baths
    Patent number: 4038079
    Abstract: Photographic bleach-fix baths containing iron-III-complexes of aminopolyacetic acids as oxidizing agents are rejuvenated by reducing the iron-III-complexes with a reducing agent other the iron and thereafter are desilvered by treatment with iron.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: July 26, 1977
    Assignee: AGFA-Gevaert Aktiengesellschaft
    Inventors: Heinz Meckl, Helmut Haseler, Adolf Seiler
  • Process for desilvering used bleach fix baths
    Patent number: 4014764
    Abstract: Photographic bleach fix baths are desilvered by electrolysis in a cell in which the cathode and anode chambers are separated by a diaphragm, with the exclusion of air, and the bleach fix bath is removed from the cell before the potential is switched off. For increasing the current yield the bleaching agent can be reduced prior to electrolysis for example by the addition of sodium dithionite.
    Type: Grant
    Filed: April 17, 1972
    Date of Patent: March 29, 1977
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Adolf Seiler, Heinz Meckl, Helmut Haseler