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Expired European patentEurope

Packing-seal for boreholes

EP 0331676 B1 · Applicant: UNIVERSITY OF WATERLOO

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Overview

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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 November 9, 1987 and granted March 18, 1992. A European patent lasts at most 20 years from filing, so its term ended November 9, 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 May 9, 2013.
  • 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.
FiledNovember 9, 1987
PublishedSeptember 13, 1989
GrantedMarch 18, 1992
Term endedNovember 9, 2007
Application numberEP 87907332
Classification (CPC)E21B33/1208 +1 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedNov 9, 1987PublishedSep 13, 1989Patent grantedMarch 18, 1992Term endedNov 9, 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

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