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European application, no grantEurope

Method and circuit arrangement for managing uniform unities and switching element

EP 0447769 A2 · Applicant: Alcatel SEL Aktiengesellschaft

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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 January 31, 1991 and never granted as a European patent. Had it been granted, its 20-year term would have ended January 31, 2011.
  • 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 July 31, 2016.
  • 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.
FiledJanuary 31, 1991
PublishedSeptember 25, 1991
GrantedNever granted
Term endedJanuary 31, 2011
Application numberEP 91101256
Classification (CPC)H04L12/5601 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJan 31, 1991PublishedSep 25, 1991Term endedJan 31, 2011

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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