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Expired European patentEurope

Photographic silver halide developer composition

EP 0753793 B1 · Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

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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 July 12, 1995 and granted November 17, 1999. A European patent lasts at most 20 years from filing, so its term ended July 12, 2015.
  • 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 January 12, 2021.
  • 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.
FiledJuly 12, 1995
PublishedJanuary 15, 1997
GrantedNovember 17, 1999
Term endedJuly 12, 2015
Application numberEP 95110914
Classification (CPC)G03C5/305

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedJuly 12, 1995PublishedJan 15, 1997Patent grantedNov 17, 1999Term endedJuly 12, 2015

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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