Optical fiber and method for producing the same
CA 1287494 C · Owner: Kyoto, Michihisa · Inventors: Watanabe, Minoru; Kyoto, Michihisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract;, The invention provides a quartz optical fiber comprising a glass cladding made of synthetic quartz and a core in which the surface layer of the cladding contains chlorine in an amount of 0.01 to 1% by weight. The presence of the chlorine produces a fiber having a larger average broken length.
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
- Granted August 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2008.
- 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.