Optical fiber transmission line
CA 2391187 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
A dispersion management optical fiber, transmission line of a superlow loss formed by combining a plurality of optical fibers and suitable for long distance, high speed, large capacity transmission, that is, an optical fiber transmission line including a positive dispersion optical fiber having a positive dispersion and a positive dispersion slope and a negative dispersion optical fiber having a negative dispersion and negative dispersion slope and having a non-zero dispersion at the 1.55 µm wherein, the transmission loss at the 1.55 µm band of the positive dispersion fiber and the negative dispersion fiber are both not more than 0:23 dB/km and the difference in transmission losses of the …
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 June 20, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 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.