Synthetic lubricant base stocks from long-chain vinylidene olefins and long-chain alpha-and/or internal olefins
CA 2048934 A1 · Owner: Sanderson, John R. · Inventors: Marquis, Edward T.; Sanderson, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
D# 81, 006-F), A process is disclosed for preparing synthetic lubricant base stocks. Synthetic lubricant base stocks may be prepared in good yield by oligomerizing long-chain olefins using certain acidic calcium montmorillonite clay catalysts. When long-chain vinylidene olefin and long-chain alpha- and/or internal-olefin are cooligomerized, a synthetic lubricant base stock having a lower pour point is obtained.
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 12, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.