3-fluorobenzodiazepines
CA 1100960 A · Owner: Merck Patent Gesellschaft Mit Beschraenkter Haftung · Inventors: Uhl, Jurgen; Poetsch, Eike; Strehlow, Wighard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel 3-fluoro-2,3-dihydro-1H-1,4-benzodiazepin-2-ones of the formula I, (I), wherein R1 is H or alkyl of 1-4 carbon atoms; R2 is phenyl or monohalophenyl; R3 is F, Cl, Br or NO2, and physiologically acceptable acid addition salts thereof are provided herein. These compounds are central nervous system depressants. They may be prepared by certain specified reactions using, as an essential starting material certain specified, bezodiazepine derivatives.
Read the whole patent
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
- Granted May 12, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 1998.
- 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.