Expired Canadian patentCanada
Method for staged cooling of particulate solids
CA 1234979 A · Owner: Atlantic Richfield Company · Inventors: Bonnecaze, Bernard F.; Li, Ying H.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method for cooling particulate solids in an expanded bed by successively charging the particulate solids to a plurality of expanded beds with the exhaust gas from each of the plurality of expanded beds being discarded.
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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 April 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 21, 1985
GrantedApril 12, 1988
Term endedApril 12, 2005
Patent numberCA 1234979 A
Classification (IPC)F26B7/00 +2 more
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.