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Expired European patentEurope

Improved method for controlling contraction in setting cementitious systems

EP 0142936 B1 · Applicant: CONSTRUCTION PRODUCTS RESEARCH INC.,

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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 October 12, 1984 and granted December 28, 1988. A European patent lasts at most 20 years from filing, so its term ended October 12, 2004.
  • 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 April 12, 2010.
  • 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.
FiledOctober 12, 1984
PublishedMay 29, 1985
GrantedDecember 28, 1988
Term endedOctober 12, 2004
Application numberEP 84307012
Classification (CPC)C04B28/02 +1 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedOct 12, 1984PublishedMay 29, 1985Patent grantedDec 28, 1988Term endedOct 12, 2004

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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