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Expired European patentEurope

Metal carbide and nitride powders for ceramics obtained by carbothermal reduction, and process for their manufacture

EP 0247907 B1 · Applicant: ELF ATOCHEM S.A.

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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 25, 1987 and granted September 15, 1993. A European patent lasts at most 20 years from filing, so its term ended March 25, 2007.
  • 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 25, 2012.
  • 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 25, 1987
PublishedDecember 2, 1987
GrantedSeptember 15, 1993
Term endedMarch 25, 2007
Application numberEP 87400663
Classification (CPC)C01B21/06 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMarch 25, 1987PublishedDec 2, 1987Patent grantedSep 15, 1993Term endedMarch 25, 2007

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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