Basic ethers and process for the preparation thereof
CA 2121003 A1 · Owner: Reiter, Klara Nee Esses · Inventors: Fekete, Marton; Reiter, Klara Nee Esses; Gyertyan, Istvan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel pharmaceutically, active basic ethers, a process for the preparation thereof and pharmaceutical compositions comprising the same. The invention also encompasses the use of the said basic ethers for the treatment of diseases and for the preparation of pharmaceutical compositions suitable for the treatment of diseases. The new compounds according to the invention are characterized by general formula (I), wherein (I), R1 and R2 are independently hydrogen halogen or C1-4, alkoxy, or together they represent a 3,4-methylenedioxy group, R stands for C1-8 alkyl, R3 represents hydrogen C1-4 alkyl or hydroxy, A is a valency bond or a methylene group R4 and R5 are …
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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 April 11, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2016.
- 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.