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Expired European patentEurope

Process for making light concrete aggregates

EP 0555424 B1 · Applicant: Stracke, Markus

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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 July 3, 1992 and granted May 13, 1998. A European patent lasts at most 20 years from filing, so its term ended July 3, 2012.
  • 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 January 3, 2018.
  • 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.
FiledJuly 3, 1992
PublishedAugust 18, 1993
GrantedMay 13, 1998
Term endedJuly 3, 2012
Application numberEP 92914265
Classification (CPC)C04B28/02 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedJuly 3, 1992PublishedAug 18, 1993Patent grantedMay 13, 1998Term endedJuly 3, 2012

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

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