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Expired European patentEurope

Combustion monitoring with an oxygen shortage sensor

EP 0085224 B1 · Applicant: MATSUSHITA ELECTRIC INDUSTRIAL 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 October 19, 1982 and granted August 3, 1988. A European patent lasts at most 20 years from filing, so its term ended October 19, 2002.
  • 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 19, 2008.
  • 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 19, 1982
PublishedAugust 10, 1983
GrantedAugust 3, 1988
Term endedOctober 19, 2002
Application numberEP 82305557
Classification (CPC)F23M11/00 +2 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedOct 19, 1982PublishedAug 10, 1983Patent grantedAug 3, 1988Term endedOct 19, 2002

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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