Phenyl heterocycles as cyclooxygenase-2 inhibitors
CA 2176973 C · Owner: Wang, Zhaoyin · Inventors: Leger, Serge; Prasit, Petpiboon; Therien, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds useful in the treatment of, cyclooxygenase-2- mediated diseases are provided of formula (I):, or a pharmaceutically acceptable salt thereof wherein: X-Y-Z- is selected from the group consisting of: (a) -CR5(R5')-O-C(O)- and, (b) -C(O)-O-CR5'(R5')-' R1 is selected from the group consisting of (a) S(O)2CH3, (b) S(O)2NH2, (c) S(O)2NHC(O)CF3 (d) S(O)(NH)CH3, (e) S(O)(NH)NH2, (f) S(O)(NH)NHC(O)CF3 (g) P(O)(CH3)OH, and, (h) P(O)(CH3)NH2 R2 is selected from the group consisting of (a) C1-6 alkyl, (b) C3, C4, C5, C6 and C7 cycloalkyl, (c) unsubstituted, mono-, di- or tri-substituted phenyl wherein the substituent is selected from the group consisting of, (1) halo (2) C1-6 alkoxy, (3) …
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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 June 9, 1994 and granted August 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 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
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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.