Crystalline salts of optically active aminocoumaran derivatives, their production and use
CA 2111033 A1 · Owner: Ohkawa, Shigenori · Inventors: Ohkawa, Shigenori; Miki, Shokyo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Crystalline Salts of optionally Active Aminocoumaran Derivatives Their Production and Use, A crystalline salt of an enantiomer of 5-amino-2,4,6,7-tetramethyl-2- (4-phenylpiperidinomethyl)-2,3-dihydrobenzobfuran which is stable and improved in solubility in water, is useful for an excellent lipidperoxide formation inhibitor.
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 December 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 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.