Expired Canadian patentCanada
Fluorocarbon seal protective additives for lubrication oils
CA 2097828 C · Owner: Onopchenko, Anatoli · Inventors: Sabourin, Edward T.; Onopchenko, Anatoli
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Certain borated aromatic polyols, such as catechol borate are found to be effective lube oil additives to compatibilize the oil with the flourocarbon polymer seals when the lube oil contains basic nitrogen.
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 August 25, 1992 and granted July 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 25, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 25, 1992
GrantedJuly 8, 2003
Term endedAugust 25, 2012
Patent numberCA 2097828 C
Classification (IPC)C10M141/06 +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.