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Expired European patentEurope

Charging device of a secondary battery for controlling termination of charging in response to the change state of terminal voltage of the secondary battery

EP 0580300 B1 · Applicant: SANYO ELECTRIC CO., 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 June 30, 1993 and granted March 26, 1997. A European patent lasts at most 20 years from filing, so its term ended June 30, 2013.
  • 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 30, 2018.
  • 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 30, 1993
PublishedJanuary 26, 1994
GrantedMarch 26, 1997
Term endedJune 30, 2013
Application numberEP 93305116
Classification (CPC)H02J7/963

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedJune 30, 1993PublishedJan 26, 1994Patent grantedMarch 26, 1997Term endedJune 30, 2013

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.