Optical wavelength conversion device
CA 2411570 A1 · Owner: Nippon Sheet Glass Co. Ltd. · Inventors: Kishimoto, Shoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical wavelength conversion device comprising: a modulating signal generating unit for generating a modulating signal; an optical modulating unit for modulating input light by the modulating signal; and wavelength select means for extracting only a necessary component from an optical signal generated by the optical modulating unit. In the optical wavelength conversion device, the optical modulating unit may be an amplitude modulator or a phase modulator. The modulating signal may be an electrical signal or an optical signal. When the modulating signal is an optical signal the optical signal, consists preferably of light of a plurality of wavelength components.
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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 November 12, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2024.
- 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.