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Generated: December 11, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,280,957

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Summary for Patent: 4,280,957

Title: Imidazodiazepines and processes therefor
Abstract:Novel Imidazobenzodiazepines and their analogs are useful as anticonvulsants, muscle relaxant, anxiolytic and sedative agents. Preferred compounds of this class belong to the imidazo[1,5-a][1,4]diazepine series which may have a very wide variety of organic substituents. An especially preferred genus included within the purview of the invention encompasses a compound of the formula ##STR1## wherein R.sub.1 is hydrogen and lower alkyl preferably methyl; R.sub.3 and R.sub.5 are hydrogen; R.sub.4 is hydrogen, nitro and halogen, most preferably, chlorine, and in a most preferred embodiment when positioned on the fused benzo portion of the imidazobenzodiazepine is in the 8-position thereof, R.sub.6 is phenyl or halo, nitro, or lower alkyl-substituted phenyl, preferably, halo, with fluorine being the preferred halogen, the substituted fluoro being positioned in the 2-position of the phenyl moiety and R.sub.2 is hydrogen and lower alkyl.
Inventor(s): Walser; Armin (West Caldwell, NJ), Fryer; Rodney I. (North Caldwell, NJ)
Assignee: Hoffmann-La Roche Inc. (Nutley, NJ)
Application Number:05/905,820
Patent Claim Types:
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International Patent Family for Patent: 4,280,957

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina215887► Subscribe
Argentina218433► Subscribe
Austria347469► Subscribe
Austria360023► Subscribe
Austria361486► Subscribe
Austria378959► Subscribe
Austria378960► Subscribe
Austria395152► Subscribe
Austria395153► Subscribe
Austria395154► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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Serving leading biopharmaceutical companies globally:

Fish and Richardson
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