Expired Canadian patentCanada
Nitrogen sorption
CA 2085026 C · Owner: Bend Research, Inc. · Inventors: Babcock, Walter C.; Miller, Warren K.; Friesen, Dwayne T.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nitrogen-sorbing and -desorbing compositions and methods of using the same are disclosed which are, useful for the selective separation of nitrogen from other gases, especially natural gas.
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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
- Filed December 10, 1992 and granted June 11, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 10, 1992
GrantedJune 11, 2002
Term endedDecember 10, 2012
Patent numberCA 2085026 C
Classification (IPC)B01D53/14 +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.