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Expired European patentEurope

Water-swellable elastomer composition

EP 0179937 B1 · Applicant: SEITETSU KAGAKU CO., 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 October 30, 1984 and granted April 25, 1990. A European patent lasts at most 20 years from filing, so its term ended October 30, 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 30, 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 30, 1984
PublishedMay 7, 1986
GrantedApril 25, 1990
Term endedOctober 30, 2004
Application numberEP 84113061
Classification (CPC)C08L101/00 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedOct 30, 1984PublishedMay 7, 1986Patent grantedApril 25, 1990Term endedOct 30, 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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