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Expired European patentEurope

Method for detecting aerosols in air of a control zone and apparatus for its performing

EP 0022438 B1 · Applicant: Securiton AG

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Overview

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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 July 13, 1979 and granted July 20, 1983. A European patent lasts at most 20 years from filing, so its term ended July 13, 1999.
  • 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 January 13, 2005.
  • 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.
FiledJuly 13, 1979
PublishedJanuary 21, 1981
GrantedJuly 20, 1983
Term endedJuly 13, 1999
Application numberEP 79200390
Classification (CPC)G08B17/107 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedJuly 13, 1979PublishedJan 21, 1981Patent grantedJuly 20, 1983Term endedJuly 13, 1999

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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