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Expired European patentEurope

Casting mass for the production of green ceramic sheets containing polyvinyl alcohol-fatty acid ester as dispersant

EP 0625489 B1 · Applicant: HOECHST 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 May 13, 1994 and granted March 4, 1998. A European patent lasts at most 20 years from filing, so its term ended May 13, 2014.
  • 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 November 13, 2019.
  • 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.
FiledMay 13, 1994
PublishedNovember 23, 1994
GrantedMarch 4, 1998
Term endedMay 13, 2014
Application numberEP 94107475
Classification (CPC)C04B35/63404 +1 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedMay 13, 1994PublishedNov 23, 1994Patent grantedMarch 4, 1998Term endedMay 13, 2014

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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