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Expired European patentEurope

Method of and apparatus for controlling loads on an electrical power supply

EP 0047089 B1 · Applicant: SOUTH EASTERN ELECTRICITY BOARD

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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 August 14, 1981 and granted November 21, 1984. A European patent lasts at most 20 years from filing, so its term ended August 14, 2001.
  • 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 February 14, 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.
FiledAugust 14, 1981
PublishedMarch 10, 1982
GrantedNovember 21, 1984
Term endedAugust 14, 2001
Application numberEP 81303720
Classification (CPC)H02J3/17 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedAug 14, 1981PublishedMarch 10, 1982Patent grantedNov 21, 1984Term endedAug 14, 2001

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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