Hepatitis c inhibitor tri-peptides
CA 2445938 C · Owner: Tsantrizos, Youla S. · Inventors: Bailey, Murray D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Racemates, diastereoisomers and optical isomers of a compound of formula (I) wherein B is H a C6 , or C10 aryl, C7-16 aralkyl; Het or (lower alkyl)-Het all of which optionally substituted with C1-6 alkyl; C1-6 alkoxy; C1-6 alkanoyl; hydroxy; hydroxyalkyl; halo; haloalkyl; nitro; cyano; cyanoalkyl; amino optionally substituted with C1-6 alkyl; amido; or (lower alkyl)amide; or B is an acyl derivative of formula R4-C(O)-; a carboxyl of formula R4-O-C(O)-; an amide of formula R4-N(R5)-C(O)-; a thioamide of formula R4-N(R5)-C(S)-;or a sulfonyl of formula R4-SO2; R5 is H or C1-6 alkyl; and Y is H or C1-6 alkyl; R3 is C1-8 alkyl, C3-7 cycloalkyl, or C4-10 alkylcycloalkyl all , optionally …
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 August 9, 1999 and granted October 30, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2021.
- 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.