Cytokine production inhibitors, triazepine compounds, and intermediates thereof
CA 2258053 A1 · Owner: Yamamoto, Yoshihisa · Inventors: Nakamura, Takeshi; Shindo, Masanori; Yamamoto, Yoshihisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cytokine production inhibitors containing compounds represented by general formula (I), novel triazepine compounds and intermediates for producing these triazepine compounds. The compounds (I) inhibit the production of cytokines such as IL-6, TNF-.alpha. IL-8, IFN.gamma. IL-2 and GM-CSF and are useful as cytokine production inhibitors and antiinflammatory drugs. In formula (I) R1 , represents aryl or heteroaryl; B represents formula (a) or (b) (wherein R2 , represents hydrogen, hydroxy halogeno, etc.; R4 represents hydrogen or halogeno, or R2 and R4 may together form carbonyl; R3 represents lower alkoxy cycloalkyl, aryl, heteroaryl, -X-Y {wherein X represents -(CH2)m- -CO-, -, COCH2-, …
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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 11, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 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.