Synthetic lubricant base stocks by co-reaction of olefins and anisole or like compounds
CA 2044020 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# 80,959-F), Synthetic lubricant base stocks having an increased viscosity are disclosed. These synthetic lubricant base stocks comprise a mixture of (1) oligomers prepared from a linear olefin having from 10 to 24 carbon atoms; and (2) alkylated anisole having an alkyl group containing from 10 to 24 carbon atoms. These synthetic lubricant base stocks may be prepared by co-reacting a linear olefin having from 10 to 24 carbon atoms and anisole. Optionally the mixture of oligomers and alkylated anisoles may be hydrogenated, to prepare a mixture of reduced oligomers and alkylated methoxycyclohexanes.
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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
- Filed June 7, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 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.