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Expired European patentEurope

Process for the fabrication of thinning agents for mineral binders

EP 0306629 B1 · Applicant: RÜTGERSWERKE 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 June 10, 1988 and granted November 3, 1993. A European patent lasts at most 20 years from filing, so its term ended June 10, 2008.
  • 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 10, 2013.
  • 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 10, 1988
PublishedMarch 15, 1989
GrantedNovember 3, 1993
Term endedJune 10, 2008
Application numberEP 88109263
Classification (CPC)C08G16/0237 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJune 10, 1988PublishedMarch 15, 1989Patent grantedNov 3, 1993Term endedJune 10, 2008

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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