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Expired European patentEurope

Water softening process

EP 0495451 B1 · Applicant: YEDA RESEARCH AND DEVELOPMENT CO. LTD.

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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 14, 1992 and granted September 7, 1994. A European patent lasts at most 20 years from filing, so its term ended January 14, 2012.
  • 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 14, 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.
FiledJanuary 14, 1992
PublishedJuly 22, 1992
GrantedSeptember 7, 1994
Term endedJanuary 14, 2012
Application numberEP 92100501
Classification (CPC)C02F5/02

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedJan 14, 1992PublishedJuly 22, 1992Patent grantedSep 7, 1994Term endedJan 14, 2012

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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