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Expired European patentEurope

Process for preparing highly water absorbent resin

EP 0533192 B1 · Applicant: LUCKY 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 September 18, 1992 and granted April 23, 1997. A European patent lasts at most 20 years from filing, so its term ended September 18, 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 March 18, 2018.
  • 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.
FiledSeptember 18, 1992
PublishedMarch 24, 1993
GrantedApril 23, 1997
Term endedSeptember 18, 2012
Application numberEP 92116017
Classification (CPC)C08J3/24

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedSep 18, 1992PublishedMarch 24, 1993Patent grantedApril 23, 1997Term endedSep 18, 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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