Expired Canadian patentCanada
Crystalline fumaric acid salts of 9,9-alkylene-3, 7-diazabicyclononane compounds and pharmaceutical compositions containing them
CA 2084489 C · Owner: Kali-Chemie Pharma Gmbh · Inventors: Heitmann, Walter; Schoen, Uwe; Maetzel, Uwe
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Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1,5-Fumaric acid salts of N,N'-di-lower alkylsubstituted 9,9-alkylene-3,7-diazabicyclo3.3.1nonanes and a process for obtaining them in stoichiometrically pure and virtually non-hygroscopic form.
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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 December 3, 1992 and granted October 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 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.
FiledDecember 3, 1992
GrantedOctober 8, 2002
Term endedDecember 3, 2012
Patent numberCA 2084489 C
Classification (IPC)C07D471/10 +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.