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Expired European patentEurope

Optical transparent member and optical system using the same

EP 1693689 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 February 20, 2006 and granted August 20, 2008. A European patent lasts at most 20 years from filing, so its term ended February 20, 2026.
  • 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.
FiledFebruary 20, 2006
PublishedAugust 23, 2006
GrantedAugust 20, 2008
Term endedFebruary 20, 2026
Application numberEP 06110175
Classification (CPC)C03C1/006 +2 more

Timeline

Timeline From EPO dates

2007200920112013201520172019202120232025Application filedFeb 20, 2006PublishedAug 23, 2006Patent grantedAug 20, 2008Term endedFeb 20, 2026

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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