Expired Canadian patentCanada
Procede et installation pour le pompage du petrole brut de grandes profondeurs
CA 775348 A · Owner: Ministerul Industriei Petrolului Si Chimiei · Inventors: Gheorghe Petrescu
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 January 9, 1968. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 9, 1985.
- 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—
GrantedJanuary 9, 1968
Term endedJanuary 9, 1985
Patent numberCA 775348 A
Classification (IPC)F04B47/00
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.