Expired Canadian patentCanada
Procede d'obtention d'eau lourde par echange bitherme entre h2o et h2s
CA 975533 A · Owner: Commissariat A L'Energie Atomique · Inventors: Agostini, Jean-Pierre
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 7, 1975. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 1992.
- 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 7, 1975
Term endedOctober 7, 1992
Patent numberCA 975533 A
Classification (IPC)C01B5/02 +2 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.