Novel benzodiazepine derivative
CA 2177960 A1 · Owner: Haga, Nobuhiro · Inventors: Seno, Kaoru; Kamata, Susumu; Ishihara, Yasunobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A benzodiazepine derivative represented by general formula (I) and a pharmaceutically acceptable salt thereof wherein R1 represents a single bond, -CH2- -CH2O-, -OCH2-, -SCH2- or (a); R2 represents lower alkyl -COOR5, -, CONH(CH2)nCOOR5, -CONHSO2R5 -SO2NHCOR5 or optionally substituted heterocyclic group, (wherein R5 represents hydrogen lower alkyl or benzyl; and n , represents an integer of 1 to 5); R3 represents a single bond -CO- or -CONH; , and R4 represents optionally substituted heterocylic group optionally , substituted lower alkyl, optionally substituted lower cycloalkyl optionally , substituted aryl, or lower alkoxycarbonyl. This compound has a high affinity for gastrin receptors …
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
- Filed December 19, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2016.
- 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.