Expired Canadian patentCanada
Pharmaceutical composition containing carbachol and other cholinergic substances
CA 2114239 C · Owner: Astrazeneca Ab · Inventors: Hahnenberger, Rudolph Wolfgang
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the use of substances based on carbachol methacholine, bethanechol, furtrethonium and arecholine having cholinergic properties for the preparation of medicaments for the treatment of keratoconjunctivitis sicca.
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 August 7, 1992 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 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.
FiledAugust 7, 1992
GrantedOctober 21, 2003
Term endedAugust 7, 2012
Patent numberCA 2114239 C
Classification (IPC)A61K31/45 +2 more
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.