Olefin oligomers functional fluid using internal olefins
CA 2001802 C · Owner: Amoco Corporation · Inventors: Shubkin, Ronald L.; Kuehnhanss, Gerhard O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Olefin oligomers having a lower pour point are obtained by forming a mixture of C8-18 olefins containing 50-90 weight percent .alpha.-olefins and 10-50 weight percent internal olefins and oligomerizing this mixture using a Friedel Crafts catalyst (e.g. BF3) and a promoter (e.g. n-butanol). The mixture of olefins can be formed from .alpha.-olefins (e.g. 1-decene) by subjecting the .alpha.-olefins to isomerization until 10-50 weight percent of the olefins are internal olefins.
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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 October 30, 1989 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2011.
- 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.