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Expired European patentEurope

Method and composition for treatment of metals

EP 0664348 B1 · Applicant: BETZ EUROPE, INC.

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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 19, 1994 and granted September 10, 1997. A European patent lasts at most 20 years from filing, so its term ended January 19, 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 July 19, 2019.
  • 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 19, 1994
PublishedJuly 26, 1995
GrantedSeptember 10, 1997
Term endedJanuary 19, 2014
Application numberEP 94100750
Classification (CPC)C23C22/44

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJan 19, 1994PublishedJuly 26, 1995Patent grantedSep 10, 1997Term endedJan 19, 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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