Base oil composition
CA 2437858 A1 · Owner: Shell Internationale Research Maatschappij B.V. · Inventors: Wedlock, David John; Daniel, Mervyn Frank; Germaine, Gilbert Robert Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lubrication base oil composition comprising at least 95 wt % saturates of , which saturates fraction between 19 and 30 wt % are cyclo-paraffins and the remainder being n-and iso-paraffins, said composition having a viscosity index of above 120 and a pour point of below -15 ~C.
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 13, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 13, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 2024.
- 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.