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Expired European patentEurope

Water-soluble dyes and inks formulated by insolubilizing reactions initiated by loss of water

EP 0540248 B1 · Applicant: Hewlett-Packard Company

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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 October 22, 1992 and granted December 23, 1998. A European patent lasts at most 20 years from filing, so its term ended October 22, 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 22, 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 22, 1992
PublishedMay 5, 1993
GrantedDecember 23, 1998
Term endedOctober 22, 2012
Application numberEP 92309672
Classification (CPC)C09B69/10 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedOct 22, 1992PublishedMay 5, 1993Patent grantedDec 23, 1998Term endedOct 22, 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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