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Expired European patentEurope

Method for forming crystal and crystal article obtained by said method

EP 0244081 B1 · Applicant: CANON KABUSHIKI KAISHA

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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 January 12, 1994. 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
PublishedNovember 4, 1987
GrantedJanuary 12, 1994
Term endedMarch 25, 2007
Application numberEP 87302587
Classification (CPC)H10P14/2911 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMarch 25, 1987PublishedNov 4, 1987Patent grantedJan 12, 1994Term 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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