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Expired European patentEurope

The lining of pipelines or passageways

EP 0112841 B1 · Applicant: EDGEALPHA LIMITED

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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 January 31, 1983 and granted July 13, 1988. A European patent lasts at most 20 years from filing, so its term ended January 31, 2003.
  • 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 31, 2008.
  • 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 31, 1983
PublishedJuly 11, 1984
GrantedJuly 13, 1988
Term endedJanuary 31, 2003
Application numberEP 83900640
Classification (CPC)F16L58/02 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJan 31, 1983PublishedJuly 11, 1984Patent grantedJuly 13, 1988Term endedJan 31, 2003

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.