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Expired European patentEurope

Process for the purification of pentalfuoroethane in a binary azeotrope of pentafluoroethane and chloropentafluoroethane

EP 0686137 B1 · Applicant: AlliedSignal Inc.

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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 January 31, 1994 and granted July 28, 1999. A European patent lasts at most 20 years from filing, so its term ended January 31, 2014.
  • 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 July 31, 2019.
  • 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.
FiledJanuary 31, 1994
PublishedDecember 13, 1995
GrantedJuly 28, 1999
Term endedJanuary 31, 2014
Application numberEP 94907385
Classification (CPC)C07C17/383 +1 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJan 31, 1994PublishedDec 13, 1995Patent grantedJuly 28, 1999Term endedJan 31, 2014

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.