Indole derivatives
CA 2124206 C · Owner: Pfizer Limited · Inventors: Macor, John Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I) wherein Z, is (a) or (b); R1 is (c) (d), (e) or (f); , X is O, NH or S; A, B D, E, and F are each, independently C, N O, or S; R2, R3, R4, R5 and R6 are each independently hydrogen, C1 to C6 alkyl, aryl, C1 to C3 alkyl-aryl halogen, cyano, nitro, -NR7R8, -(CH2)m OR9 -SR9, -SO2R9, -SO2NR7R8, -, NR7SO2R8, -NR7CO2R9 -NR7COR9, -CONR7R8, or -CO2R9; one of R2 and R3 R3 and R4, R4 and R5, or R5 and R6 may be taken together to form a five- to , seven-membered alkyl ring a six-membered aryl ring, a five- to seven-membered heteroalkyl ring having 1 heteroatom of N O, or S, or a five- or six-membered heteroaryl ring having 1 or 2 heteroatoms of N, O, or S; R7 and R8 are …
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 6, 1992 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2014.
- 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.