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Expired European patentEurope

Process and composition for inhibiting iron and steel corrosion

EP 0276879 B1 · Applicant: PUMPTECH N.V.

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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 14, 1988 and granted October 23, 1991. A European patent lasts at most 20 years from filing, so its term ended January 14, 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 July 14, 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.
FiledJanuary 14, 1988
PublishedAugust 3, 1988
GrantedOctober 23, 1991
Term endedJanuary 14, 2008
Application numberEP 88200047
Classification (CPC)C23F11/04 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJan 14, 1988PublishedAug 3, 1988Patent grantedOct 23, 1991Term endedJan 14, 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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