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Expired European patentEurope

Sealing ring

EP 0242431 B1 · Applicant: Firma Carl Freudenberg

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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 September 20, 1986 and granted January 3, 1990. A European patent lasts at most 20 years from filing, so its term ended September 20, 2006.
  • 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 March 20, 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.
FiledSeptember 20, 1986
PublishedOctober 28, 1987
GrantedJanuary 3, 1990
Term endedSeptember 20, 2006
Application numberEP 86112987
Classification (CPC)F16J15/3212

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedSep 20, 1986PublishedOct 28, 1987Patent grantedJan 3, 1990Term endedSep 20, 2006

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.