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Expired European patentEurope

Method for the in situ and continuous high-sensibility measuring of concentrations of gas and volatile products, and apparatus for carrying it out

EP 0042789 B1 · Applicant: BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES

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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 June 17, 1981 and granted September 18, 1985. A European patent lasts at most 20 years from filing, so its term ended June 17, 2001.
  • 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 December 17, 2006.
  • 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.
FiledJune 17, 1981
PublishedDecember 30, 1981
GrantedSeptember 18, 1985
Term endedJune 17, 2001
Application numberEP 81400967
Classification (CPC)H01J49/24

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedJune 17, 1981PublishedDec 30, 1981Patent grantedSep 18, 1985Term endedJune 17, 2001

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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