Protease inhibitors
CA 2285601 A1 · Owner: Thompson, Scott K. · Inventors: Duffy, Kevin J.; Thompson, Scott K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to compounds of formula (I) wherein: X, Y and Z independently are N O, S or CR', provided that at least two of X Y and, Z are heteroatoms and at least one of X Y and Z, is N; or one of X, Y and Z is C=N C=C or N=N, and the other two are CR' or N provided that X, Y and Z together comprise at least two N; ~ indicates a single or double bond; R1 is R", R"C(O), R"C(S), R"SO2, R"OC(O) or, R"OC(O)NR'CH(R6)C(O); R2 is H, C1-6alkyl C2-6alkenyl, Ar-C0-6alkyl, or Het-C0-, 6alkyl; R3 is H C1-6alkyl, C2-6alkenyl, C2-6alkynyl, C3-6cycloalkyl-C0-6alkyl Ar-C0-6alkyl, or Het-C0-6alkyl; R4 is H C1-6alkyl C2-6alkenyl, Ar-C0-6alkyl, or Het-C0-6alkyl; R5 is C1-6alkyl Ar-C0-6alkyl, …
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 April 15, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 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.