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Expired European patentEurope

Hollow building block

EP 0233446 B1 · Applicant: WIENERBERGER BAUSTOFFINDUSTRIE AKTIENGESELLSCHAFT

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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 December 23, 1986 and granted January 10, 1990. A European patent lasts at most 20 years from filing, so its term ended December 23, 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 June 23, 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.
FiledDecember 23, 1986
PublishedAugust 26, 1987
GrantedJanuary 10, 1990
Term endedDecember 23, 2006
Application numberEP 86890356
Classification (CPC)E04B2/14

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedDec 23, 1986PublishedAug 26, 1987Patent grantedJan 10, 1990Term endedDec 23, 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.