Substituted pyrroles
CA 2010636 C · Owner: Roche Products Limited · Inventors: Davis, Peter D.; Hill, Christopher H.; Lawton, Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula, (see formula I) wherein R represents hydrogen or hydroxy R1 and, R2 together represent a group of the formula -(CH2)n- and R7 represents hydrogen or R1 and R7 together represent a group of the formula -(CH2)n- and R2 represents hydrogen: R3 represents an aryl or heteroaryl group; R4 R5 and, R6 each independently represent hydrogen halogen, alkyl, hydroxy, alkoxy, haloalkyl nitro, amino, acylamino, alkylthio, alkylsulphinyl or alkylsulphonyl: R8 represents a group of the formula -(CH2)p-R9 or -(CH2)q-R10: R9 represents hydrogen, alkylcarbonyl, aminoalkylcarbonyl cyano, amidino, alkoxycarbonyl, aryloxycarbonyl alkylsulphonyl, aminocarbonyl or aminothiocarbonyl; R10 …
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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 February 22, 1990 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 22, 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.