Dehydrocyclization of polyalpha-olefin lubricants
CA 2123426 A1 · Owner: Mobil Oil Corporation · Inventors: Pelrine, Bruce P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aromatic structures can be introduced into the molecular structure of polyalpha-olefin (PAO) lubricant oligomers by subjecting the polyalpha-olefin to a dehydrocyclization reaction which converts a portion of the pendant or branching alkyl groups in the recurring polymeric unit of PAO to aromatic structures. When the starting material for dehydrocyclization is PAO prepared by oligomerization of C6-C20 alpha-olefins in contact with reduced chromium oxide catalyst on porous support the dehydrocyclization reaction produces a lubricant oligomer with increased aromaticity without significantly degrading the viscometric properties of the feedstock lubricant, particularly the high VI of the …
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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 November 22, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 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.