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A pyroelectric infrared sensor and a method of manufacturing a dual pyroelectric element used therein

EP 0337692 B1 · Applicant: KUREHA KAGAKU KOGYO KABUSHIKI KAISHA

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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 April 10, 1989 and granted January 18, 1995. A European patent lasts at most 20 years from filing, so its term ended April 10, 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 October 10, 2014.
  • 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.
FiledApril 10, 1989
PublishedOctober 18, 1989
GrantedJanuary 18, 1995
Term endedApril 10, 2009
Application numberEP 89303502
Classification (CPC)H10N15/10 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedApril 10, 1989PublishedOct 18, 1989Patent grantedJan 18, 1995Term endedApril 10, 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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