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Expired European patentEurope

Method for making pure stereoisomers of tetrahydrofolic acid ester salts and tetrahydrofolic acid by fractionated crystallisation of tetrahydrofolic acid salts

EP 1200436 B1 · Applicant: EPROVA AG Forschungsinstitut

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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 July 12, 2000 and granted October 29, 2008. A European patent lasts at most 20 years from filing, so its term ended July 12, 2020.
  • 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 January 12, 2026.
  • 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.
FiledJuly 12, 2000
PublishedMay 2, 2002
GrantedOctober 29, 2008
Term endedJuly 12, 2020
Application numberEP 00949322
Classification (CPC)C07D475/04

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedJuly 12, 2000PublishedMay 2, 2002Patent grantedOct 29, 2008Term endedJuly 12, 2020

Sources & verification

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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

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