Expired Canadian patentCanada
Terpolymers of ethylene, vinyl acetate and isobutylene useful as pour point depressants in distillate oils
CA 1263663 C · Owner: Millennium Petrochemicals, Inc. · Inventors: Fischer, Joseph
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Terpolymers of ethylene vinyl acetate and, controlled amounts of isobutylene useful as pour point depressants in distillate oils.
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, and the Claude kit works from them.
Why it's free to use
- Granted December 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 5, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 5, 1985
GrantedDecember 5, 1989
Term endedDecember 5, 2006
Patent numberCA 1263663 C
Classification (IPC)C08F218/08 +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.