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Expired European patentEurope

Process for producing 4-substituted azetidinone derivatives

EP 0563878 B1 · Applicant: NIPPON SODA CO., LTD.

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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 March 30, 1993 and granted August 29, 2001. A European patent lasts at most 20 years from filing, so its term ended March 30, 2013.
  • 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 September 30, 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.
FiledMarch 30, 1993
PublishedOctober 6, 1993
GrantedAugust 29, 2001
Term endedMarch 30, 2013
Application numberEP 93105239
Classification (CPC)C07D201/02 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedMarch 30, 1993PublishedOct 6, 1993Patent grantedAug 29, 2001Term endedMarch 30, 2013

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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