Flat top optical filtering component
CA 2498349 A1 · Owner: E2V Semiconductors · Inventors: Gluck, Stephane; Ramel, Romain; Jarjayes, Sylvie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns wavelength-selective optical filters for allowing through light of a narrow optical spectral band centered about a wavelength (.lambda.¿c?) and reflecting the wavelengths outside said band. The invention is characterized in that the transfer function (T¿1?,¿2?(.lambda.)) of the component is defined by multiplying two transfer functions of wavelength-shifted Fabry-Perot filters.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 9, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.