Process for developing agx lith materials using two replenishers which compensate for developer exhaustion
CA 1070548 A · Owner: Agfa-Gevaert Naamloze Vennootschap · Inventors: Nys, Pierre H.; Corluy, Hans J.; Schelfaut, Francois L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for developing photographic silver halide lith-materials in an automatic processing machine with a lith-developer, wherein two replenishers are used one for, compensation of the developer exhaustion resulting from aerial oxidation and a second replenisher serving for the compensation of exhaustion by development.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.