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Expired European patentEurope

Method and apparatus for processing downlink digital voice data

EP 0578993 B1 · Applicant: Siemens Rolm Communications Inc. (a Delaware corp.)

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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 June 21, 1993 and granted September 15, 1999. A European patent lasts at most 20 years from filing, so its term ended June 21, 2013.
  • 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 December 21, 2018.
  • 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.
FiledJune 21, 1993
PublishedJanuary 19, 1994
GrantedSeptember 15, 1999
Term endedJune 21, 2013
Application numberEP 93109856
Classification (CPC)H04M1/253

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedJune 21, 1993PublishedJan 19, 1994Patent grantedSep 15, 1999Term endedJune 21, 2013

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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