Amines, process for their preparation, as well as medicaments containing these compounds
CA 2098929 A1 · Owner: Boehringer Mannheim Gmbh · Inventors: Doerge, Liesel; Stegmeier, Karlheinz; Witte, Ernst-Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I) in which: R1 is an aryl, aralkyl or, an aralkenyl group the aryl radical of which may be singly or multiply substituted by halogen, cyanogen alkyl, trifluoromethyl, alkoxy, alkylthio trifluoromethoxy, hydroxy or carboxy; m is a whole number from 1 to 3; n is an integer from 1 to 5; R2 is hydrogen, an alkyl, aralkyl or acyl group; Q is a bond or an aoxygen atom; R3 is hydrogen or a low alkyl group which may be substituted in the terminal position by carboxyl or a hydroxy group; and R4 is hydrogen, a low alkyl group with 1 to 4 C atoms which, may be substituted in the terminal position by carboxyl or hydroxyl, a possibly substituted phenyl heteroaryl, cycloalkyl or …
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 December 19, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2013.
- 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.