Expired Canadian patentCanada
Ammonium nitrate explosive
CA 401792 A · Owner: Canadian Industries Limited · Inventors: Milton Heins Wahl
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 December 30, 1941. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1958.
- 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—
GrantedDecember 30, 1941
Term endedDecember 30, 1958
Patent numberCA 401792 A
Classification (IPC)C06B31/32
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.