Thiadiazole antiviral agents
CA 1307222 C · Owner: Spitzer, Wayne A. · Inventors: Paget, Charles J. Jr.; Blanchard, William B.; Spitzer, Wayne A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I) (I), wherein:, R1 is hydrogen, and R2 is cyano or, -C(=S)-NH-R3; or, R1 and R2 taken together are =C(NH2)2 or =C(R5)(NHR3');, R3 and R3' are hydrogen or -COOR4; R4 is C1-C10 alkyl, substituted C1-C10 alkyl C2-C10 alkenyl, substituted C2-C10 alkenyl phenyl, or, substituted phenyl; and, R5 is hydrogen or -S-R6 where R6 is C1-C4 alkyl, cyano-C1-C4 alkyl or pyridyl-C1-C4 alkyl and, salts thereof, are useful antiviral agents.
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
- Granted September 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 2009.
- 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.