Ruthenium-diphosphine complexes and their use as catalysts
CA 2414049 A1 · Owner: Zanotti-Gerosa, Antonio · Inventors: Zanotti-Gerosa, Antonio; Burk, Mark Joseph; Hems, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel complexes, suitable in particular for use as catalysts in the asymmetric hydrogenation of ketones, are of formula (1) or a diastereoisomer thereof wherein each Ar is an aromatic or heteroaromatic group of up to 20 atoms; X is halide or carboxylate; and R1, R2, R3, R4 are independently hydrogen aryl or , alkyl, optionally linked or part of a ring.
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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 March 23, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2023.
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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.