Optical fiber and method of manufacturing the same
CA 2440938 A1 · Owner: Kubo, Yuji · Inventors: Shimizu, Makoto; Shimoda, Koji; Kubo, Yuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fiber (1), comprising a glass part (2) having a core (2a) and a clad (2b) and a coated layer (3) of one layer or more formed around the glass part (2), wherein the configuration of arrangement of the coated layer (3) on the glass part (2) at a cross section perpendicular to the longitudinal direction of the optical fiber is varied continuously in the longitudinal direction.
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 March 13, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 13, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 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.