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Expired European patentEurope

Method of determining the amount of an anionic material

EP 0182102 B1 · Applicant: International Business Machines 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 October 17, 1985 and granted September 25, 1991. A European patent lasts at most 20 years from filing, so its term ended October 17, 2005.
  • 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 April 17, 2011.
  • 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.
FiledOctober 17, 1985
PublishedMay 28, 1986
GrantedSeptember 25, 1991
Term endedOctober 17, 2005
Application numberEP 85113176
Classification (CPC)C23C18/38 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedOct 17, 1985PublishedMay 28, 1986Patent grantedSep 25, 1991Term endedOct 17, 2005

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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