Dihydrodibenzob,eoxazepine derivatives and pharmaceutical composition containing the same
CA 2261271 C · Owner: Takahashi, Kazuyoshi · Inventors: Kawakami, Yoshinari; Sato, Makoto; Misumi, Keiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel 5,11-dihydrodibenzob,e1,4oxazepine derivatives represented by formula I:, (see formula I), wherein R1 and R2 are the same or different and each represents a hydrogen atom, a halogen atom a cyano group, a hydroxy group or a C1-C5 alkoxy group or R1 and R2, together form -O(CH2)n O- in which n is 1 2 or 3, R3, represents a hydrogen atom or hydroxy group R4 and R5 are, the same or different and each represents a hydrogen atom or hydroxy group, or R4 and R5 together form =O group stereoisomers thereof, pharmacologically acceptable salts thereof, and hydrates thereof. The compounds of the invention are useful for treating digestive tract abnormal moving function …
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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 March 11, 1997 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2019.
- 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.