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Expired European patentEurope

Positive image forming method

EP 0190512 B1 · Applicant: KONICA 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 December 30, 1985 and granted September 30, 1992. A European patent lasts at most 20 years from filing, so its term ended December 30, 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 June 30, 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.
FiledDecember 30, 1985
PublishedAugust 13, 1986
GrantedSeptember 30, 1992
Term endedDecember 30, 2005
Application numberEP 85309538
Classification (CPC)G03C1/48538

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedDec 30, 1985PublishedAug 13, 1986Patent grantedSep 30, 1992Term endedDec 30, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.