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Expired European patentEurope

Mixed crystals and solid solutions of 1,4 diketopyrrolopyrroles

EP 0704497 B1 · Applicant: CIBA-GEIGY AG

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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 September 20, 1995 and granted December 15, 1999. A European patent lasts at most 20 years from filing, so its term ended September 20, 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 March 20, 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.
FiledSeptember 20, 1995
PublishedApril 3, 1996
GrantedDecember 15, 1999
Term endedSeptember 20, 2015
Application numberEP 95810590
Classification (CPC)C09B67/003 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedSep 20, 1995PublishedApril 3, 1996Patent grantedDec 15, 1999Term endedSep 20, 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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