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Expired European patentEurope

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EP 0335237 B1 · Applicant: BASF Aktiengesellschaft

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 22, 1989 and granted September 23, 1992. A European patent lasts at most 20 years from filing, so its term ended March 22, 2009.
  • 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 22, 2014.
  • 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 22, 1989
PublishedOctober 4, 1989
GrantedSeptember 23, 1992
Term endedMarch 22, 2009
Application numberEP 89105094
Classification (CPC)C09B69/001 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedMarch 22, 1989PublishedOct 4, 1989Patent grantedSep 23, 1992Term endedMarch 22, 2009

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.