Cyclohexenone oxime ethers
CA 2115277 C · Owner: Meyer, Norbert · Inventors: Gerber, Matthias; Westphalen, Karl-Otto; Harreus, Albrecht
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cyclohexenone oximethers have, the formula (I) in which n is 0 to 5; m is 0, to 2; R1 stands for C1-C6 alkyl; R2 stands for C1-C4 alkyl or benzyl; A, stands for C1-C6 alkylene C3-C6 alkenylene, C3-C6 alkinylene, C3-C6 alkylene or C4-C6 alkenylene chains, all these elements being optionally substituted. In each of them a methylene group may be substituted by O, S, SO, SO2 or -N(R a)-; R a stands for H, C1-C4 alkyl, C3-C6 alkenyl C3-C6 alkinyl; Z stands for phenyl, 5-membered heteroaromate or 6-membered heteroaromate with 1 to 4 N atoms; X stands for NO2 CN, halogen, C1-C4 alkyl, C1-C4 halogenalkyl C1-C4 alkoxy, C1-C4 al-, kylthio, C1-C4 halogenalkoxy COOH, C1-C4 alkoxycarbonyl, optionally …
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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 August 5, 1992 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 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.