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Expired European patentEurope

Method of and apparatus for filtering a medium

EP 0280052 B1 · Applicant: DONGBEI POWER COLLEGE

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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 26, 1988 and granted July 27, 1994. A European patent lasts at most 20 years from filing, so its term ended January 26, 2008.
  • 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 26, 2013.
  • 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 26, 1988
PublishedAugust 31, 1988
GrantedJuly 27, 1994
Term endedJanuary 26, 2008
Application numberEP 88101111
Classification (CPC)B01D46/28 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJan 26, 1988PublishedAug 31, 1988Patent grantedJuly 27, 1994Term endedJan 26, 2008

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.