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Expired European patentEurope

Process for the Reduction of nitrogen oxides

EP 0377975 B1 · Applicant: Atomic Energy of Canada Limited L'Energie Atomique du Canada Limitée

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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 December 13, 1989 and granted March 22, 1995. A European patent lasts at most 20 years from filing, so its term ended December 13, 2009.
  • 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 June 13, 2015.
  • 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.
FiledDecember 13, 1989
PublishedJuly 18, 1990
GrantedMarch 22, 1995
Term endedDecember 13, 2009
Application numberEP 89313043
Classification (CPC)B01J31/06 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedDec 13, 1989PublishedJuly 18, 1990Patent grantedMarch 22, 1995Term endedDec 13, 2009

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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