Expired Canadian patentCanada
Gas-generating guanidine nitrate charges containing phenolic derivatives
CA 488221 A · Owner: Imperial Chemical Industries Limited · Inventors: Alexander Cantlay Hutchison
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
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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.
Why it's free to use
- Granted November 18, 1952. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 1969.
- 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—
GrantedNovember 18, 1952
Term endedNovember 18, 1969
Patent numberCA 488221 A
Classification (IPC)C06B25/00
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.