New esters and ester compositions
CA 2374308 A1 · Owner: Lint, Jos-Van · Inventors: Lint, Jos-Van; Steverink-De-Zoete, Marian; Hoogendoorn, Ronald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to new esters and ester compositions based on a polyol a dicarboxylic acid and a monocarboxylic acid a process for their preparation , and their use in hydraulic fluids and metal working fluids. The new esters and ester compositions have improved clean burning and lubricity properties when used in/as metal working fluids, especially rolling fluids. The new esters and ester compositions have improved biodegradability and thermal and oxidative stability properties when used in/as hydraulic fluids.
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 June 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2022.
- 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.