Optical fiber having plastic cladding and process for preparation thereof
CA 1339175 C · Owner: Mitsubishi Rayon Company Ltd. · Inventors: Yamamoto, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A core-cladding optical fiber having a plastic cladding composed of-an amorphous copolymer having a single glass transition temperature of at least 125°C but lower than 140°C is described. The amorphous copolymer comprises (a) units derived from a fluorodioxole represented by the formula I: (see fig.I), wherein R and R' are ~luorine or trifluoromethyl, and (b) units derived from at least one monomer selected from tetrafluoroethylene, chlorotrifluoroethylene Rf - CF = CF2 (in which Rf is a primary fluoroalkyl group having 1 to 5 carbon atoms) and Rg - OCF = CF2 (in which Rg is a primary fluoroalkyl group having 1 to 5 carbon atoms or a primary fluoroalkyl group having 4 to 12 carbon atoms as …
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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
- Granted July 29, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 2014.
- 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.