Boron containing lubricating oil composition containing a low level of sulfur and phosphorus
CA 2434334 A1 · Owner: Lamb, Gordon D. · Inventors: Carrick, Virginia A.; Abraham, William D.; Lamb, Gordon D.
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 lubricating oil composition comprising: (A) a , base oil and (B) a boron-containing compound represented by the formulae(RO)3- B or (RO)2-B-O-B (OR)2 (B-1) (B-II)or a cyclic trimeric structure (B-III) wherein in formulae (B-1), (B-11) and (B-111) each R is independently an organic group and any two adjacent R groups may together form a cyclic group; the lubricating oil composition containing sulfur boron and optionally , phosphorus with the ratio of sulfur to boron to phosphorus being represented by the formula S1 + 5B1 + 3P1 > 0.35 wherein S1 is the concentration in percent by weight of sulfur in the composition B1 is the concentration in , percent by weight …
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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 January 31, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 31, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 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.