Expired European patentEurope
Method of modification of the reflection coefficient of the extremity of a monomode fibre and fibre interferometer fabricated using such method
EP 0286475 B1 · Applicant: ALCATEL ALSTHOM COMPAGNIE GENERALE D'ELECTRICITE
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 March 14, 1988 and granted May 13, 1992. A European patent lasts at most 20 years from filing, so its term ended March 14, 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 September 14, 2013.
- 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.
FiledMarch 14, 1988
PublishedOctober 12, 1988
GrantedMay 13, 1992
Term endedMarch 14, 2008
Application numberEP 88400595
Classification (CPC)G02B6/02052 +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.