Optical fiber and optical transmission line
CA 2347272 A1 · Owner: The Furukawa Electric Co. Ltd. · Inventors: Mukasa, Kazunori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fiber having a dispersion value of 6 to 24 ps/nm/km at 1.55 µm wavelength and satisfying the condition expressed by A > 3 x D + 40 where A (µm2) is the effective core cross section and D (ps/nm/km) is the dispersion value at the center wavelength in the 1.55 µm wavelength band. An optical transmission line comprising the optical fiber for transmitting an optical signal is also disclosed.
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 August 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2022.
- 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.