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Expired European patentEurope

Determination of the number of revolutions of electrical machines

EP 0068237 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 June 11, 1982 and granted September 11, 1985. A European patent lasts at most 20 years from filing, so its term ended June 11, 2002.
  • 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 11, 2007.
  • 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 11, 1982
PublishedJanuary 5, 1983
GrantedSeptember 11, 1985
Term endedJune 11, 2002
Application numberEP 82105133
Classification (CPC)G01P3/48

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedJune 11, 1982PublishedJan 5, 1983Patent grantedSep 11, 1985Term endedJune 11, 2002

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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