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Expired European patentEurope

Process and apparatus for increasing the axial thermal gradient in the directional solidification of fused material

EP 0131680 B1 · Applicant: DORNIER SYSTEM GmbH

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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 March 14, 1984 and granted May 27, 1987. A European patent lasts at most 20 years from filing, so its term ended March 14, 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 September 14, 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.
FiledMarch 14, 1984
PublishedJanuary 23, 1985
GrantedMay 27, 1987
Term endedMarch 14, 2004
Application numberEP 84102762
Classification (CPC)C30B11/003

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedMarch 14, 1984PublishedJan 23, 1985Patent grantedMay 27, 1987Term endedMarch 14, 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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