Fluorinated beta-ketoimines and beta-ketoiminato metal complexes
CA 2004639 A1 · Owner: Norman, John A. T. · Inventors: Norman, John A. T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fluorinated .beta.-ketoimine ligands and highly volatile .beta.-ketoiminato metal complexes of the ligands are synthesized by silylating a fluorinated .beta.-diketone to form a silylenolether and subsequently reacting the, silylenolether with a primary diamine to form the desired ligand having the structural formula:, wherein R1, R2, R4 and R5 are independently linear or branched perfluorinated, C1-C8 alkyl groups and R3 is any organic functionality such as a C1-C8 alkyl, phenyl or hydroxyalkyl group all of which can be, partially or fully fluorinated. The corresponding metal complex is formed by treating the ligand with a metal halide.
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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 December 5, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2011.
- 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.