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Expired European patentEurope

Smoke detection system

EP 0825575 B1 · Applicant: Airsense Technology Limited

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 August 1, 1994 and granted July 16, 2003. A European patent lasts at most 20 years from filing, so its term ended August 1, 2014.
  • 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 February 1, 2020.
  • 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.
FiledAugust 1, 1994
PublishedFebruary 25, 1998
GrantedJuly 16, 2003
Term endedAugust 1, 2014
Application numberEP 97116861
Classification (CPC)G08B17/113 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedAug 1, 1994PublishedFeb 25, 1998Patent grantedJuly 16, 2003Term endedAug 1, 2014

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.