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EP 0393570 B1 · Applicant: ALCATEL BUSINESS SYSTEMS

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Overview

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

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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 April 17, 1990 and granted December 14, 1994. A European patent lasts at most 20 years from filing, so its term ended April 17, 2010.
  • 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 October 17, 2015.
  • 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.
FiledApril 17, 1990
PublishedOctober 24, 1990
GrantedDecember 14, 1994
Term endedApril 17, 2010
Application numberEP 90107233
Classification (CPC)H04M11/085

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedApril 17, 1990PublishedOct 24, 1990Patent grantedDec 14, 1994Term endedApril 17, 2010

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.