2-heterocyclicethylamine derivatives and their use as pharmaceuticals
CA 2122633 C · Owner: Murray, Robert John · Inventors: Schmiesing, Richard John; Murray, Robert John; Griffith, Ronald Conrad
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 A represents C = C S or O; Q represents a 5-, or 6-membered unsaturated heterocycling ring having a nitrogen atom in the position adjacent to the point of attachment, 0-3 further heteroatoms selected from N O, and S, and substituents R6 and R7; R1 represents H or C1-6alkyl; R2 represents H, C1-6alkyl, C3-6alkenyl, C3-6alkynyl C3-6cycloalkyl or NH2CH2CO-; in addition R1 and R2 taken together may form a , C3-5alkylene chain; R3 represents H C1-6alkyl, C3-6alkenyl; C3-6alkynyl; R4 and R5 independently represent H OH, C1-6 alkoxy, C1-6 alkyl, halogen, trifluoromethyl or NR8R9; R6 and R7 independently represent H OH, C1-6 alkoxy, C1-6 , alkyl, halogen …
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 28, 1992 and granted December 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 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.