Gas separation by pressure swing adsorption
CA 2016045 C · Owner: Keefer, Bowie Gordon · Inventors: Keefer, Bowie Gordon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pressure swing adsorption is performed to separate a feed gas mixture into a product gas and a depleted gas mixture in which, either a more readily adsorbed component or a less readily adsorbed component of the feed gas mixture has been substanitally purified in the product gas. The apparatus and process provide for recovery of expansion energy, and for large exchanges of fresh feed gas for depleted gas mixture during each cycle.
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
- Filed May 4, 1990 and granted August 16, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2012.
- 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.