Packed absorption towers
CA 2205729 C · Owner: Bhaga, Dahya · Inventors: Cameron, Gordon M.; Bhaga, Dahya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved packed tower for effecting the absorption of a gas into a liquid comprising a cylindrical tower wall defining a packing zone; a plurality of packing pieces contained within the packing zone; a liquid distributor above the packing zone for distributing liquid onto the packing pieces; a gas feed inlet below the packing pieces for feeding gas through the packing zone, the improvement wherein the plurality of packing pieces comprises a first plurality of packing pieces of a first packing piece size, disposed within a first region of the packing zone defining an annulus adjacent an upper part of the tower wall, and a second plurality of packing pieces of a second packing piece size …
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 21, 1997 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2019.
- 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.