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Expired European patentEurope

Low heat building cement composition

EP 0579831 B1 · Applicant: NIHON CEMENT CO., LTD.

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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 April 7, 1992 and granted November 11, 1998. A European patent lasts at most 20 years from filing, so its term ended April 7, 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 October 7, 2017.
  • 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.
FiledApril 7, 1992
PublishedJanuary 26, 1994
GrantedNovember 11, 1998
Term endedApril 7, 2012
Application numberEP 92908048
Classification (CPC)C04B7/345

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedApril 7, 1992PublishedJan 26, 1994Patent grantedNov 11, 1998Term endedApril 7, 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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