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Expired European patentEurope

Safety device for load tap changer

EP 0035604 B1 · Applicant: ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme

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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 March 7, 1980 and granted August 31, 1983. A European patent lasts at most 20 years from filing, so its term ended March 7, 2000.
  • 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 September 7, 2005.
  • 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.
FiledMarch 7, 1980
PublishedSeptember 16, 1981
GrantedAugust 31, 1983
Term endedMarch 7, 2000
Application numberEP 80200222
Classification (CPC)H01H9/0033 +1 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedMarch 7, 1980PublishedSep 16, 1981Patent grantedAug 31, 1983Term endedMarch 7, 2000

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.