Benzenesulfonamide compounds
CA 2309969 A1 · Owner: Speciale, Carmela · Inventors: Varasi, Mario; Pevarello, Paolo; Greco, Felicita
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I) wherein X is O or S; at least one of R R1, R2, R3, and R4, which are the same or different is an unsaturated pentatomic , heteromonocyclic ring containing one to three heteroatoms chosen independently from oxygen, sulphur and nitrogen, wherein the heteromonocyclic ring is unsubstituted or substituted by one or two substituents chosen independently from halogen, hydroxy, trifluoromethyl nitro, amino, phenyl, benzyl, C1-C6 , alkyl C1-C6 alkoxy, C2-C6 alkanoylamino, formylamino and C1-C6 alkoxycarbonyl or two adjacents of R-R4 taken together form a benzene ring; and the remaining ones are hydrogen; R5 is hydrogen C1-C6 alkyl, a benzyl or a phenyl , group in which …
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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 October 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 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.