Mono, bis or tris(2,2'-substituted bipyridine) complexes of a metal selected amongst iron, ruthenium, osmium or vanadium and preparation methods thereof
CA 2080834 C · Owner: Gratzel, Michael · Inventors: Nazeeruddin, Mohammed Khaja; Fraser, David; Zakeeruddin, Shaik Mohammed
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mono, bis and tris(substituted 2,2'-bipyridine) complexes of iron, ruthenium. osmium or vanadium are described wherein the bipyridine is substituted by at least one electron donor group. The donor group is a hydroxy alkoxy, aryloxy group or a primary, secondary or tertiary amino group. Processes for the preparation of these complexes.
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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 February 19, 1992 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2014.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.