Specific 1,4-dihydropyridine-3,5-dicarboxylic acid ester, process for its preparation and its pharmaceutical use
CA 2087245 A1 · Owner: Goldmann, Siegfried · Inventors: Goldmann, Siegfried; Wollweber, Hartmund; Zaiss, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Specific 1,4-dihydropyridine-3,5-dicarboxylic acid ester process for the preparation, and its pharmaceutical use Abstract, The invention relates to the new dimethyl 2,6-dimethyl-1-n-propyl-4-(trifluoromethylphenyl)-1,4-dihydropyridine-3-dicarboxylate a process for its preparationand its use as a medicament in ischaemic diseases which are associated with disorders of the microcirculation. This action can occur both in the peripheral and in the cerebral vascular system.
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 January 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2015.
- 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.