Method of and apparatus for treating photographic process waste liquor through concentration by evaporation
CA 1322985 C · Owner: Koboshi, Shigeharu · Inventors: Kurematsu, Masayuki; Goto, Nobutaka; Takabayashi, Naoki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of and apparatus for treating photographic process waste liquor through concentration by evaporation Disclosed is a method of treating photographic process waste liquor through concentration by evaporation comprising heating photographic process waste liquor to allow at least part thereof to evaporate and, concentrating remaining liquid for its collection wherein the photographic process waste liquor is treated by evaporation at a temperature lower than the boiling point thereof in at least one part of the processing course, and condensing vapor thereby produced. Also disclosed is an apparatus for treating photographic process waste liquor through concentration by evaporation, …
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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 October 12, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 12, 2010.
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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.