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Expired European patentEurope

Method for producing large, single-crystals of aluminum nitride

EP 1587971 B1 · Applicant: Crystal Is, 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 May 7, 2003 and granted March 25, 2009. A European patent lasts at most 20 years from filing, so its term ended May 7, 2023.
  • 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.
FiledMay 7, 2003
PublishedOctober 26, 2005
GrantedMarch 25, 2009
Term endedMay 7, 2023
Application numberEP 03808366
Classification (CPC)C30B23/00 +2 more

Timeline

Timeline From EPO dates

2004200620082010201220142016201820202022Application filedMay 7, 2003PublishedOct 26, 2005Patent grantedMarch 25, 2009Term endedMay 7, 2023

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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