Expired Canadian patentCanada
Detection or estimation of carbon monoxide
CA 451675 A · Owner: Minister Of Supply In His Majesty'S Government Of The United Kingdom Of Great Britain And Northern Ireland · Inventors: John David Main-Smith; George Alan Earwicker
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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
- Granted October 5, 1948. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 5, 1965.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedOctober 5, 1948
Term endedOctober 5, 1965
Patent numberCA 451675 A
Classification (IPC)G01N
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.