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Expired European patentEurope

Method of preparation of cholecalciferol derivatives and new intermediate compounds

EP 1047671 B1 · Applicant: INSTYTUT FARMACEUTYCZNY

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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 December 29, 1998 and granted December 10, 2003. A European patent lasts at most 20 years from filing, so its term ended December 29, 2018.
  • 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 June 29, 2024.
  • 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.
FiledDecember 29, 1998
PublishedNovember 2, 2000
GrantedDecember 10, 2003
Term endedDecember 29, 2018
Application numberEP 98960122
Classification (CPC)C07C401/00 +1 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedDec 29, 1998PublishedNov 2, 2000Patent grantedDec 10, 2003Term endedDec 29, 2018

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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