Multiguide cylindrical optical conductor for telecommunications cables
CA 2091124 C · Owner: Alcatel Cable · Inventors: Jocteur, Robert; Dumas, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multiguide cylindrical optical conductor for telecommunications cables comprising a number of optical fibres, each fibre being an elementary cylindrical fibre consisting of a core and cladding. The elementary fibres are all bonded in silica following a fibre drawing operation. The core of each elementary cylindrical fibre (3) has a diameter on the order of 8µ to 10µ and the cladding has an outer diameter between 25µ and 35µ. The cores of all the elementary fibres (3) either regularly follow the generators of a cylinder in the same axis (13) as the conductor (10) or are parallel to each other and coplanar. In this way an optical conductor with an outer diameter of 125µ containing six guides …
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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 March 5, 1993 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2015.
- 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
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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.