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Expired European patentEurope

Hydrothermal process for growing optical-quality single crystals and aqueous mineralizer therefor

EP 0628097 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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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 February 26, 1993 and granted April 24, 1996. A European patent lasts at most 20 years from filing, so its term ended February 26, 2013.
  • 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 August 26, 2018.
  • 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.
FiledFebruary 26, 1993
PublishedDecember 14, 1994
GrantedApril 24, 1996
Term endedFebruary 26, 2013
Application numberEP 93906118
Classification (CPC)C30B7/00 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedFeb 26, 1993PublishedDec 14, 1994Patent grantedApril 24, 1996Term endedFeb 26, 2013

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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