Reinforced multicore optical fiber coupler
CA 2114691 C · Owner: Suganuma, Hiroshi · Inventors: Takimoto, Hiroaki; Sasaoka, Eisuke; Hattori, Tomoyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reinforced structure for a multicore optical fiber coupler wherein a longitudinal coating resin of a multicore optical fiber, having a plurality of optical fiber strands positioned in parallel arrangement to each other and collectively coated with a common coating resin is partially, removed so as to expose the glass portions of the optical fiber strands. The exposed glass portions are then fused and extended. The non-extended portions on the opposite sides of the fused and extended portion of the glass portion of each of the plurality of optical fiber strands in the extending direction are accommodated respectively in a plurality of grooves formed in a reinforcing casing. The reinforcing …
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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 February 1, 1994 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2016.
- 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.