Liquid chromatograph and analysis system
CA 2445939 A1 · Owner: Natsume, Tohru · Inventors: Natsume, Tohru; Yamauchi, Yoshio; Isobe, Toshiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid chromatograph, an analyzing system and a gradient eluting method contrived such that a high accuracy gradient variation of eluate is enabled and high sensitivity detection or analysis can be realized. The liquid chromatograph comprises means (1) for feeding eluate E at a specified flow rate, means (9) for injecting a sample Sm into the elutriant E and a column , means (13) for separating a soute So contained in the sample Sm. The liquid chromatograph further comprises means (8) for branching the channel (3) of eluate E fed from the feeding means (1) to form branch channels (7 7, ...) of , a specified capacity, storing eluates E1 E2, ... of different composition , temporarily …
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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 April 8, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 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.