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Expired European patentEurope

Growth of ulta-high purity silicon carbide crystals in an ambient containing hydrogen

EP 1664397 B1 · Applicant: CREE, INC.

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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 July 26, 2004 and granted December 23, 2009. A European patent lasts at most 20 years from filing, so its term ended July 26, 2024.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledJuly 26, 2004
PublishedJune 7, 2006
GrantedDecember 23, 2009
Term endedJuly 26, 2024
Application numberEP 04779095
Classification (CPC)C30B23/00 +1 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedJuly 26, 2004PublishedJune 7, 2006Patent grantedDec 23, 2009Term endedJuly 26, 2024

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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