Compounds
CA 2027093 A1 · Owner: Wadsworth, Harry J. · Inventors: Wadsworth, Harry J.; Orlek, Barry S.; Jenkins, Sarah M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstact, Novel Compounds, A compound of formula (I) or a pharmaceutically acceptable salt thereof:, (I), in which one of X and Y represents hydrogen and the other represents Z, where Z is a group in which Q represents a 3-membered divalent residue completing a 5-membered aromatic ring and comprises zero, one or two nitrogen atoms, Q being optionally C-substituted by a group R1 selected from halogen CN, OR2, SR2, N(R2)2, NHCOR2, NHCOOCH3 NHCOOC2H5, NHOR2, N3, NHNH2, NO2, COR2 COR3, C2-4 alkenyl, C2-4 alkynyl, cyclopropyl or C1-2 alkyl optionally substituted with OR2, N(R2)2, SR2, CO2R2, CON(R2)2 or one two or three, halogen atoms, in which each R2 is independently hydrogen or C1-2 alkyl and …
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 October 5, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2012.
- 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.