Inhibitors of the production of s-cd23 and the secretion of tnf
CA 2253590 A1 · Owner: Bailey, Stuart · Inventors: Faller, Andrew; Buckle, Derek Richard; Smith, David Glynn
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: R is hydroxy hydrogen, alkyl, alkenyl, alkynyl or aryl; R1 is arylmethyl or heterocyclylmethyl; R2 is alkyl alkenyl, aryl, cycloalkyl or cycloalkenyl; and R3 is hydrogen alkyl, alkenyl, alkynyl , or aryl; with the provisio that: if R1 is phenylmethyl or naphtylmethyl wherein the phenyl or naphthyl group is unsubstituted or substituted by up to five substituents selected from the group consisting of halogen (C1-6)alkyl, aryl(C1-6)alkyl, (C1-6)alkoxy (C1-6)alkoxy(C1-6)alkyl, halo(C1-6)alkyl hydroxy, nitro, amino, mono- and di-N-(C1-6)alkylamino acylamino, acyloxy, carboxy, carboxy salts carboxy esters, carbamoyl, mono- and di-N-(C1- 6)alkylcarbamoyl, …
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 May 6, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 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.