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Expired European patentEurope

Method for preparation of antimony and tellurium-containing metal oxide catalysts

EP 0281280 B1 · Applicant: NITTO 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 February 18, 1988 and granted November 7, 1990. A European patent lasts at most 20 years from filing, so its term ended February 18, 2008.
  • 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 August 18, 2013.
  • 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.
FiledFebruary 18, 1988
PublishedSeptember 7, 1988
GrantedNovember 7, 1990
Term endedFebruary 18, 2008
Application numberEP 88301385
Classification (CPC)B01J27/0576

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedFeb 18, 1988PublishedSep 7, 1988Patent grantedNov 7, 1990Term endedFeb 18, 2008

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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