Expired Canadian patentCanada
Mist oil lubricant
CA 2247178 C · Owner: Exxonmobil Chemical Patents Inc. · Inventors: Zielinski, James
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mist oil lubricants are disclosed based on polycarboxylic acid esters as the base oil which have added 1 to 5 % of polyisobutylene Mn 400-2500 as stray mist suppressants.
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
- Filed March 14, 1997 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 14, 1997
GrantedOctober 14, 2003
Term endedMarch 14, 2017
Patent numberCA 2247178 C
Classification (IPC)C10M171/00 +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.