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Expired European patentEurope

Process and device for manufacturing precast elements made of prestressed concrete with immediate tensioning, in particular prestressed concrete sleepers

EP 0579809 B1 · Applicant: DYCKERHOFF & WIDMANN AG

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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 February 8, 1993 and granted March 20, 1996. A European patent lasts at most 20 years from filing, so its term ended February 8, 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 August 8, 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.
FiledFebruary 8, 1993
PublishedJanuary 26, 1994
GrantedMarch 20, 1996
Term endedFebruary 8, 2013
Application numberEP 93903923
Classification (CPC)E01B3/34 +1 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedFeb 8, 1993PublishedJan 26, 1994Patent grantedMarch 20, 1996Term endedFeb 8, 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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