Nitroaromatic solubilizer for nitroxyls in aromatic solvents
CA 2406720 C · Owner: Eisenstein, Andrew J. · Inventors: Grewal, Ruben S.; Geelan, Brendan J.; Benage, Brigitte
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is a method for increasing the solubility of a compound having the structural formula (I), in an aromatic hydrocarbon solvent comprising adding to said solvent a nitroaromatic compound having the structure (II) wherein, in formula (II) R25, R26, R27, R28, R29 and R30 are , independently selected from the group consisting of hydrogen alkyl, aryl, cycloalkyl, heterocyclic, substituted alkyl substituted aryl, OR11, NR11R12, SR11, NO2 NO, CN, COR11, COOR11, CONR11R12, NR11COR12 halogen, and/or any , two adjacent groups can be taken together to form ring structures(s) of five to seven members, provided that at least one of R25 R26, R27, R28, R29 and , R30 is NO2, and R11 and …
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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 3, 2001 and granted March 6, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2023.
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Timeline
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.