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Expired European patentEurope

Method of cleaning water and apparatus therefor

EP 0630857 B1 · Applicant: Hayakawa, Hideo

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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 31, 1993 and granted November 12, 1997. A European patent lasts at most 20 years from filing, so its term ended August 31, 2013.
  • 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 3, 2019.
  • 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 31, 1993
PublishedDecember 28, 1994
GrantedNovember 12, 1997
Term endedAugust 31, 2013
Application numberEP 93113896
Classification (CPC)C02F1/46104

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedAug 31, 1993PublishedDec 28, 1994Patent grantedNov 12, 1997Term endedAug 31, 2013

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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