European application, no grantEurope
New optically active metoprolol tartrate salts, and method of preparing them, and method of preparing optically active metoprolol from the tartrate salts
EP 0487237 A1 · Applicant: Nitto Denko Co. Ltd.
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 12, 1991 and never granted as a European patent. Had it been granted, its 20-year term would have ended November 12, 2011.
- A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by May 12, 2017.
- We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledNovember 12, 1991
PublishedMay 27, 1992
GrantedNever granted
Term endedNovember 12, 2011
Application numberEP 91310439
Classification (CPC)C07C217/32
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.