Expired European patentEurope
An optical beam splitting method and an optical beam splitting/modulation method
EP 0342291 B1 · Applicant: THINK LABORATORY CO., LTD.
Overview
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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 November 21, 1988 and granted August 3, 1994. A European patent lasts at most 20 years from filing, so its term ended November 21, 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 May 21, 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.
FiledNovember 21, 1988
PublishedNovember 23, 1989
GrantedAugust 3, 1994
Term endedNovember 21, 2008
Application numberEP 88311007
Classification (CPC)G02B27/106 +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.