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Expired European patentEurope

Ink jet head and ink jet apparatus equipped with the head

EP 0539947 B1 · Applicant: CANON KABUSHIKI KAISHA

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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 October 28, 1992 and granted April 15, 1998. A European patent lasts at most 20 years from filing, so its term ended October 28, 2012.
  • 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 April 28, 2018.
  • 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.
FiledOctober 28, 1992
PublishedMay 5, 1993
GrantedApril 15, 1998
Term endedOctober 28, 2012
Application numberEP 92118427
Classification (CPC)B41J2/1606

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedOct 28, 1992PublishedMay 5, 1993Patent grantedApril 15, 1998Term endedOct 28, 2012

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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