Inhibitors of kynureninase
CA 2108670 A1 · Owner: Phillips, Robert S. · Inventors: Dua, Rajesh K.; Phillips, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides inhibitors of kynureninase having formula (I), where X is CHOH, S, SO2, SO SONH, PO2H or, PONH2, RA and RB, independently of one another are H, a halogen, CF3 or a small alkyl group having one to three carbon atoms; A is a H or an acetyl group; R1 is H, NH2 NR6R7, NO2, halogen, CF3 or a small alkyl group having from one to three carbon atoms, wherein: R6 and R7, independently of one another are H, a formyl group or a small alkyl group having from one to three carbon atoms with the exception that only one of R6 or R7 can be a formyl group; R2 is OH, H, halogen CF3 or a small, alkyl group having from one to three carbon atoms; and R3 R4 and R5, independently of …
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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 April 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2014.
- 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.