Expired Canadian patentCanada
Horizontal regenerative thermal oxidizer unit
CA 2203226 C · Owner: Niknafs, Hassan S. · Inventors: Niknafs, Hassan S.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A regenerative thermal oxidizer unit comprising two heat regenerator units in which a gas to be purified from VOCs passes, through the units in an essentially horizontal direction.
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 April 21, 1997 and granted June 20, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 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.
FiledApril 21, 1997
GrantedJune 20, 2000
Term endedApril 21, 2017
Patent numberCA 2203226 C
Classification (IPC)F28D17/02 +1 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.