Expired Canadian patentCanada
Parrafin settling inhibition process in crude oils and their fractions
CA 1231908 A · Owner: Societe Nationale Elf Aquitaine · Inventors: Volle, Jean-Luc; Maldonado, Paul; Damin, Bernard
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
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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 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 13, 1984
GrantedJanuary 26, 1988
Term endedJanuary 26, 2005
Patent numberCA 1231908 A
Classification (IPC)C10G71/00 +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.