Closed intermittent drying process
CA 1268941 C · Owner: Zeilon, Sten Olof · Inventors: Zeilon, Sten Olof
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A closed intermittent process for drying a moist material, in which process gas is circulated internally for transporting vapour formation heat and water vapour out of the material, said water vapour being condensed from a cooled mixture of gas and water vapour and, for heating the material to be dried. The material is stored in at least two essentially equally large lots (31, 32), each in one essentially gastight chamber (1, 2). Through one lot (31) there is conducted alternately during a cooling/drying cycle a first circulating gas flow (11) cooled against a cooling medium flow and, during an equally long heating cycle a second circulating gas flow (12) heated against a heating medium …
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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 May 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
- 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.