Patent Yard Sign in
Expired European patentEurope

Circuit for controlling an electromagnet

EP 0047614 B1 · Applicant: LUCAS INDUSTRIES public limited company

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed August 28, 1981 and granted August 21, 1985. A European patent lasts at most 20 years from filing, so its term ended August 28, 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 28, 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 28, 1981
PublishedMarch 17, 1982
GrantedAugust 21, 1985
Term endedAugust 28, 2001
Application numberEP 81303945
Classification (CPC)H03K17/64 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedAug 28, 1981PublishedMarch 17, 1982Patent grantedAug 21, 1985Term endedAug 28, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.