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Expired European patentEurope

Corrosion inhibition by formation of iron carboxylate

EP 0667402 B1 · Applicant: PETROLITE CORPORATION

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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 7, 1994 and granted April 5, 2000. A European patent lasts at most 20 years from filing, so its term ended September 7, 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 March 7, 2020.
  • 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 7, 1994
PublishedAugust 16, 1995
GrantedApril 5, 2000
Term endedSeptember 7, 2014
Application numberEP 94306576
Classification (CPC)C23F11/124

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedSep 7, 1994PublishedAug 16, 1995Patent grantedApril 5, 2000Term endedSep 7, 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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