Optical fiber and optical transmission system including the same
CA 2352268 A1 · Owner: Sasaoka, Eisuke · Inventors: Kato, Takatoshi; Sasaoka, Eisuke; Tanaka, Shigeru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fiber and optical transmission system realizing good optical communication in 1.3 µm and 1.55 µm wavelength bands. The optical fiber is characterized in that the optical fiber has only one zero dispersion wavelength in a wavelength range from 1.20 µm to 1.60 µm the zero , dispersion wavelength is in a wavelength range from 1.37 µm to 1.50 µm and the optical fiber has a positive dispersion slope at the zero dispersion wavelength. The optical fiber enables good optical communication using signal light in the 1.3 µm and 1.55 µm wavelength bands on both sides of the zero dispersion wavelength.
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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 26, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2021.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.