Antiwear agents for lubricating compositions
CA 2281606 A1 · Owner: Nibert, Roger Keith · Inventors: Nibert, Roger Keith; Puckace, James Stanley; Watts, Raymond Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sulfur-containing boroester compounds useful as antiwear additives for oleaginous compositions including acyclic borate thioesters having general formula (I) wherein R1 represents a hydrocarbyl radical having between 4 to 12 carbon atoms, R2 and R3 independently represent -(OR4)nSR1 and -(OR4)nSR1OH; R4 represents a hydrocarbyl radical having between 1 to 6 carbon atoms; n is an integer of from between 1 to 4; and 1 and m are independently 0 1 or 2; or , thioalkyl-substituted cyclic metaborate ester having general formula (II) wherein n, R1 and R4, are defined as in formula (I); or a mixture of the acyclic compounds of formula (I) and the cyclic compounds of formula (II).
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 December 14, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2020.
- 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.