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Expired European patentEurope

Process for the separation of enantiomers of 5-hetaryl-1,3,4-thiadiazinone

EP 0530657 B1 · Applicant: MERCK PATENT GmbH

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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.

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Why it's free to use

  • Filed August 26, 1992 and granted November 6, 1996. A European patent lasts at most 20 years from filing, so its term ended August 26, 2012.
  • 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 February 26, 2018.
  • 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.
FiledAugust 26, 1992
PublishedMarch 10, 1993
GrantedNovember 6, 1996
Term endedAugust 26, 2012
Application numberEP 92114505
Classification (CPC)C07D417/14 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedAug 26, 1992PublishedMarch 10, 1993Patent grantedNov 6, 1996Term endedAug 26, 2012

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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