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Expired European patentEurope

Synthetic silica glass optical members and process for the production thereof

EP 1061052 B1 · Applicant: Asahi Glass Co., Ltd.

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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 January 29, 1999 and granted July 30, 2003. A European patent lasts at most 20 years from filing, so its term ended January 29, 2019.
  • 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 July 29, 2024.
  • 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.
FiledJanuary 29, 1999
PublishedDecember 20, 2000
GrantedJuly 30, 2003
Term endedJanuary 29, 2019
Application numberEP 99901911
Classification (CPC)C03C23/00 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedJan 29, 1999PublishedDec 20, 2000Patent grantedJuly 30, 2003Term endedJan 29, 2019

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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