Lubricating oils
CA 2197958 A1 · Owner: Atkins, Martin Philip · Inventors: Atkins, Martin Philip; Ellis, Brian; Smith, Mark Royston
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a process for the production of lubricating oils having a viscosity index of at least 120 and a pour point of -45°C or less said, process comprising oligomerizing a feedstock comprising one or more C5-C18 1-olefins in the presence of an oligomerization catalyst comprising an ionic liquid to form a lubricating oil.
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 February 19, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2019.
- 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.