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Expired European patentEurope

Process and plant for purifying industrial waste water

EP 0701972 B1 · Applicant: RICOH KYOSAN 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 September 17, 1994 and granted December 23, 1998. A European patent lasts at most 20 years from filing, so its term ended September 17, 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 March 17, 2020.
  • 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 17, 1994
PublishedMarch 20, 1996
GrantedDecember 23, 1998
Term endedSeptember 17, 2014
Application numberEP 94114660
Classification (CPC)C02F1/66 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedSep 17, 1994PublishedMarch 20, 1996Patent grantedDec 23, 1998Term endedSep 17, 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

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