Optical fiber holder, optical fiber grating forming apparatus, optical fiber grating forming method, and optical fiber grating
CA 2407000 A1 · Owner: Hashimoto, Takashi · Inventors: Hashimoto, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fiber holder is provided with two cylindrical drums (6a and 6b) placed at a predetermined distance from each other and each having a groove (3) formed in a spiral fashion both end portions of an optical fiber (1) being wound around the two cylindrical drums (6a and 6b), respectively so that, they are wound along the grooves (3) of the two cylindrical drums (6a and 6b), respectively. The two cylindrical drums (6a and 6b) are relatively moved in opposite directions so that they are away from each other to apply a desired tension to the optical fiber (1).
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 October 9, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 9, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 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.