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Expired European patentEurope

Liquid non-aqueous composition with an ionic character and its use as a solvent

EP 0448445 B1 · Applicant: INSTITUT FRANCAIS DU PETROLE

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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 March 12, 1991 and granted January 13, 1999. A European patent lasts at most 20 years from filing, so its term ended March 12, 2011.
  • 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 September 12, 2016.
  • 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.
FiledMarch 12, 1991
PublishedSeptember 25, 1991
GrantedJanuary 13, 1999
Term endedMarch 12, 2011
Application numberEP 91400674
Classification (CPC)B01J31/24 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedMarch 12, 1991PublishedSep 25, 1991Patent grantedJan 13, 1999Term endedMarch 12, 2011

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.