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Expired European patentEurope

Apparatus, method for enrichment of the heavy isotopes of oxygen and production method for heavy oxygen water

EP 1092467 B1 · Applicant: NIPPON SANSO CORPORATION

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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 October 11, 2000 and granted August 23, 2006. A European patent lasts at most 20 years from filing, so its term ended October 11, 2020.
  • 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 April 11, 2026.
  • 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.
FiledOctober 11, 2000
PublishedApril 18, 2001
GrantedAugust 23, 2006
Term endedOctober 11, 2020
Application numberEP 00420206
Classification (CPC)F25J3/08 +1 more

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedOct 11, 2000PublishedApril 18, 2001Patent grantedAug 23, 2006Term endedOct 11, 2020

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

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