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Expired European patentEurope

Method for forming direct positive color image

EP 0204530 B1 · Applicant: KONICA CORPORATION

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 30, 1986 and granted September 11, 1991. A European patent lasts at most 20 years from filing, so its term ended May 30, 2006.
  • 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 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.
FiledMay 30, 1986
PublishedDecember 10, 1986
GrantedSeptember 11, 1991
Term endedMay 30, 2006
Application numberEP 86304149
Classification (CPC)G03C1/48538

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMay 30, 1986PublishedDec 10, 1986Patent grantedSep 11, 1991Term endedMay 30, 2006

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.