Cyclooxygenase inhibitor
CA 2276984 A1 · Owner: Tanaka, Zyunji · Inventors: Tanaka, Zyunji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cyclooxygenase-2-inhibitor containing as an active ingredient a compound having-cyclooxygenase-2-inhibitory activity and exhibiting low toxicity that causes only minor side effects. The active compound is represented by the following formula (1) or (1'):, wherein R1 represents a hydrogen atom or a C1-C3 alkyl group; R2 represents a hydrogen atom, a hydroxyl group an organic, group capable of being bound through its thiol group within the molecule, or R1 and R2 may loin to each other to form a single bond; R3 represents a hydrogen atom a halogen atom, a, C1-C3 alkyl group, a C1-C3 alkoxyl group a trifluoromethyl, group, or a nitro group; each of R4 and R5 which may be, identical to or …
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 June 30, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2021.
- 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.