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European application, no grantEurope

Method of improving the tolerances of outside diameter and of wall thickness during size-rolling and stretch-reducing of roughly pierced tube blanks

EP 0128112 A2 · Applicant: MANNESMANN 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 April 16, 1984 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 16, 2004.
  • 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 16, 2009.
  • 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 16, 1984
PublishedDecember 12, 1984
GrantedNever granted
Term endedApril 16, 2004
Application numberEP 84730038
Classification (CPC)B21B37/78

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedApril 16, 1984PublishedDec 12, 1984Term endedApril 16, 2004

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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