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Expired European patentEurope

Thermistor and its preparation

EP 0392467 B1 · Applicant: SUMITOMO ELECTRIC INDUSTRIES, 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 April 10, 1990 and granted July 1, 1998. A European patent lasts at most 20 years from filing, so its term ended April 10, 2010.
  • 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, 2015.
  • 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, 1990
PublishedOctober 17, 1990
GrantedJuly 1, 1998
Term endedApril 10, 2010
Application numberEP 90106868
Classification (CPC)H01C7/041 +1 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedApril 10, 1990PublishedOct 17, 1990Patent grantedJuly 1, 1998Term endedApril 10, 2010

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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