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Expired European patentEurope

Anti-crevice corrosion sealant, and method of using it

EP 0090912 B1 · Applicant: Hitachi, 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 January 21, 1983 and granted April 20, 1988. A European patent lasts at most 20 years from filing, so its term ended January 21, 2003.
  • 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 July 21, 2008.
  • 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.
FiledJanuary 21, 1983
PublishedOctober 12, 1983
GrantedApril 20, 1988
Term endedJanuary 21, 2003
Application numberEP 83100543
Classification (CPC)C08K3/08 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJan 21, 1983PublishedOct 12, 1983Patent grantedApril 20, 1988Term endedJan 21, 2003

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.