Compounds
CA 2014379 C · Owner: Orlek, Barry S. · Inventors: Bromidge, Steven M.; Orlek, Barry S.; Dabbs, Steven
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of formula (I) or a pharmaceutically acceptable salt thereof:, (see formula I) wherein R1 represents, (see formula A) or (see formula B) in which each of p and q independently represents an integer of 2 to 4, r represents an integer of 2 to 4 s, represents 1 or 2 arid t represents 0 or 1; R2 is a group OR4, where R4 is C1-4 alkyl C2-4, alkenyl, C2-4 alkynyl, a group OCOR5 where R5 is hydrogen or R4, or a group NHR6 or NR7R8 where R6 R7, and R8 are independently C1-2 alkyl; and R3 is chloro, fluoro, bromo, cyclopropyl C1-3 alkyl, substituted by one, two or three halogen atoms or R3, is a group (CH2)n R9 where R9 is -CN -OH, -OCH3, -SH, -SCH3, -C~CH or -CH=CH2 and n is 0 or 1 with …
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 11, 1990 and granted February 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 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.