Joining optical fibers by fusion
CA 2008261 C · Owner: Asano, Yasuo · Inventors: Asano, Yasuo; Yanagi, Tooru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arrangement for effectively fusing, together two optical fibers. Many fibers currently have a carbon-based coating applied to the bare fiber, with the coating being surrounded by a plastic jacket. It has been difficult to fuse the two fibers together due to the coating. The present invention provides an effective method for removing the coating using a rapid and high temperature electric discharge. The removal of the coating allows a better connection of the two fibers with the connection having a low transmission loss.
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 January 22, 1990 and granted December 27, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2012.
- 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.