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Expired European patentEurope

Cold cleaning composition based on alkanes or cycloalkanes and an organic compound comprising a ketone group

EP 0821725 B1 · Applicant: ELF ATOCHEM S.A.

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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 April 17, 1996 and granted March 1, 2000. A European patent lasts at most 20 years from filing, so its term ended April 17, 2016.
  • 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 October 17, 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.
FiledApril 17, 1996
PublishedFebruary 4, 1998
GrantedMarch 1, 2000
Term endedApril 17, 2016
Application numberEP 96913600
Classification (CPC)C11D7/50 +1 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedApril 17, 1996PublishedFeb 4, 1998Patent grantedMarch 1, 2000Term endedApril 17, 2016

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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