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Expired European patentEurope

Data processing system for chromatography

EP 0161672 B1 · Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED

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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 May 14, 1985 and granted October 9, 1991. A European patent lasts at most 20 years from filing, so its term ended May 14, 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 November 14, 2010.
  • 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.
FiledMay 14, 1985
PublishedNovember 21, 1985
GrantedOctober 9, 1991
Term endedMay 14, 2005
Application numberEP 85105946
Classification (CPC)G06F18/00

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedMay 14, 1985PublishedNov 21, 1985Patent grantedOct 9, 1991Term endedMay 14, 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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