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Expired European patentEurope

Catalyst and method for decomposing ozone by the use thereof

EP 0501003 B1 · Applicant: SAKAI CHEMICAL INDUSTRY 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 August 21, 1991 and granted March 20, 1996. A European patent lasts at most 20 years from filing, so its term ended August 21, 2011.
  • 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 21, 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.
FiledAugust 21, 1991
PublishedSeptember 2, 1992
GrantedMarch 20, 1996
Term endedAugust 21, 2011
Application numberEP 91113995
Classification (CPC)B01J23/34 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedAug 21, 1991PublishedSep 2, 1992Patent grantedMarch 20, 1996Term endedAug 21, 2011

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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