Method for producing a fluorinated ester compound by means of gas chromatography
CA 2429074 A1 · Owner: Asahi Glass Co. Ltd. · Inventors: Kawahara, Kengo; Isemura, Tsuguhide; Okazoe, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Determining accurately the amount of a fluorinated ester in the preparation thereof or determining accurately the consumption of a fluorinated ester and the amount of a formed substance in the chemical transformation of the ester enables efficient preparation of the objective substance in a yield equal to or higher than an objective level. That is a process for preparing a , fluorinated ester from starting compounds by a chemical reaction characterized in that the reaction is continued until the yield of the ester reaches a predetermined level as determined by gas chromatography with a nonpolar column.
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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 November 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2023.
- 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.