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Expired European patentEurope

Method and apparatus for recovering chemical compounds from the effluent stream of a supercritical fluid extraction

EP 0551352 B1 · Applicant: DIONEX CORPORATION

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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 September 19, 1991 and granted August 26, 1998. A European patent lasts at most 20 years from filing, so its term ended September 19, 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 March 19, 2017.
  • 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.
FiledSeptember 19, 1991
PublishedJuly 21, 1993
GrantedAugust 26, 1998
Term endedSeptember 19, 2011
Application numberEP 91917448
Classification (CPC)B01D11/0203 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedSep 19, 1991PublishedJuly 21, 1993Patent grantedAug 26, 1998Term endedSep 19, 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

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