Fail-safe automatic shut-down apparatus and method for high output power optical communications system
CA 2096403 C · Owner: Alcatel Networks Systems, Inc. · Inventors: Mcdermott, Thomas C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a fiber-optic communications system a shut-down, apparatus in the event of a fiber-optic cable disruption includes a first optical fiber cable for propagating signals in a first direction and having a plurality of adjacent amplifiers disposed along the first cable. A second optical fiber cable for propagating signals in a second direction, opposite the first direction includes, a plurality of adjacent amplifiers disposed along the second cable. Each of the amplifiers in the second optical fiber cable are interconnected to one of the amplifiers of the first optical fiber cable to form a plurality of amplifier pairs. Circuitry is provided for terminating operation or reducing the output …
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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 May 17, 1993 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 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
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.