Process for the preparation of an organo-substituted sodium aluminum hydride
CA 2003848 A1 · Owner: Osaka, Shuichi · Inventors: Iwao, Tetsuya; Nakagawa, Haruo; Yamamura, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is provided herein for preparing an organosubstituted sodium aluminum hydride. Such organosubstituted sodium aluminum hydride is represented by the formula:, NaAlHXZ4-x, wherein X is an integer of 1 to 3 and Z is an organic, group obtained by eliminating an active hydrogen atom from (1) an alcohol or a phenol; (2) a tetrahydrofurfuryl alcohol; (3) an ether alcohol obtained by alkylating one hydroxyl group of a diol; (4) a polyether alcohol obtained by condensation of an ether alcohol and diol so as to remove one mole of water; (5) a tetrahydropyranyl alcohol; or (6) a compound having the formula:, (R)2=N(-CH2)nOH wherein R is the same or different and is selected from the group …
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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 24, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 24, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2011.
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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.