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Expired European patentEurope

Liquid composition and process for treating aluminium or tin cans to impart corrosion resistance and reduced friction coefficient

EP 0533823 B1 · Applicant: HENKEL CORPORATION

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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 June 13, 1991 and granted January 4, 1995. A European patent lasts at most 20 years from filing, so its term ended June 13, 2011.
  • 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 December 13, 2016.
  • 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.
FiledJune 13, 1991
PublishedMarch 31, 1993
GrantedJanuary 4, 1995
Term endedJune 13, 2011
Application numberEP 91912131
Classification (CPC)C23C22/68 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJune 13, 1991PublishedMarch 31, 1993Patent grantedJan 4, 1995Term endedJune 13, 2011

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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