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Expired European patentEurope

Admixture and method for optimizing addition of eo/po superplasticizer to concrete containing smectite clay-containing aggregates

EP 1015398 B1 · Applicant: W.R. GRACE & CO.-CONN.

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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 June 19, 1998 and granted May 19, 2010. A European patent lasts at most 20 years from filing, so its term ended June 19, 2018.
  • 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 December 19, 2023.
  • 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.
FiledJune 19, 1998
PublishedJuly 5, 2000
GrantedMay 19, 2010
Term endedJune 19, 2018
Application numberEP 98930431
Classification (CPC)C04B28/02 +2 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedJune 19, 1998PublishedJuly 5, 2000Patent grantedMay 19, 2010Term endedJune 19, 2018

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

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