Expired European patentEurope
Optical recording medium, process for preparing the same and its optical recording and reproducing system
EP 0300733 B1 · Applicant: CANON KABUSHIKI KAISHA
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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.
Why it's free to use
- Filed July 19, 1988 and granted January 5, 1994. A European patent lasts at most 20 years from filing, so its term ended July 19, 2008.
- 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 January 19, 2014.
- 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.
FiledJuly 19, 1988
PublishedJanuary 25, 1989
GrantedJanuary 5, 1994
Term endedJuly 19, 2008
Application numberEP 88306596
Classification (CPC)G11B7/26 +2 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.