Method for preparation of carborane anions
CA 2442419 A1 · Owner: Michl, Josef · Inventors: Michl, Josef; King, Benjamin T.; Franken, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an improved method for making unsubstituted carborane anions and monosubstituted carborane anions of formula: (R - CBn - Hm')- where n is an integer ranging from 5 to about 11 and m' is an integer ranging from 5 to 16 where the relative values of n and m' depend upon the exact structure of the carborane and the presence of a non-hydrogen substituent. m as used herein is an integer ranging from 5 to 16. When R is hydrogen the anion is unsubstituted. When R is a halogen a phenyl, a , substituted phenyl group such as fluorophenyl group, or any other substituent, the carborane is substituted. The method is particularly useful for preparation of twelve-vertex …
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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 1, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2024.
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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.