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Expired European patentEurope

Charging circuit with battery charge monitor circuit

EP 0631363 B1 · Applicant: NEC CORPORATION

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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 27, 1994 and granted June 4, 1997. A European patent lasts at most 20 years from filing, so its term ended June 27, 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 December 27, 2019.
  • 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 27, 1994
PublishedDecember 28, 1994
GrantedJune 4, 1997
Term endedJune 27, 2014
Application numberEP 94304641
Classification (CPC)H02J7/96

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 27, 1994PublishedDec 28, 1994Patent grantedJune 4, 1997Term endedJune 27, 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

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