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Expired European patentEurope

An agent for water treatment

EP 0761604 B1 · Applicant: NIPPON SHOKUBAI CO., LTD.

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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 August 12, 1996 and granted June 14, 2000. A European patent lasts at most 20 years from filing, so its term ended August 12, 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 February 12, 2022.
  • 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.
FiledAugust 12, 1996
PublishedMarch 12, 1997
GrantedJune 14, 2000
Term endedAugust 12, 2016
Application numberEP 96112961
Classification (CPC)C02F5/10 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedAug 12, 1996PublishedMarch 12, 1997Patent grantedJune 14, 2000Term endedAug 12, 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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