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Expired European patentEurope

Process for the separation of phenols and bases from coal tar oils by extraction

EP 0241636 B1 · Applicant: RÜTGERSWERKE AKTIENGESELLSCHAFT

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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 January 12, 1987 and granted September 26, 1990. A European patent lasts at most 20 years from filing, so its term ended January 12, 2007.
  • 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 July 12, 2012.
  • 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.
FiledJanuary 12, 1987
PublishedOctober 21, 1987
GrantedSeptember 26, 1990
Term endedJanuary 12, 2007
Application numberEP 87100269
Classification (CPC)C10G21/003

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedJan 12, 1987PublishedOct 21, 1987Patent grantedSep 26, 1990Term endedJan 12, 2007

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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