Sulfonyl derivatives
CA 2304285 A1 · Owner: Nagata, Tsutomu · Inventors: Kobayashi, Syozo; Nagahara, Takayasu; Mochizuki, Akiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sulfonyl derivatives represented by general formula (I) salts of the same, and solvates of both; and application of them as drugs: wherein R1 is hydrogen, hydroxyl, nitro or the like; R2 and R3 are each independently hydrogen, halogeno or the like; R4 and R5 are each independently hydrogen halogeno or the like; Q1 is an optionally substituted saturated or unsaturated 5- or 6-membered cyclic hydrocarbon group or the like; Q2 is a single bond oxygen or the like; Q3 is, e.g. a group represented by formula (a); T1 is carbonyl or the like; and X1 and X2 are each independently methylidyne or nitrogen. These compounds exhibit potent Fxa inhibiting activities and serve as excellent …
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 September 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2020.
- 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.