Hybrid integrated optical add-drop multiplexer
CA 2384157 A1 · Owner: Norwood, Robert A. · Inventors: Norwood, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An integrated optical add/drop multiplexer (OADM) comprising a multilayer stack formed to add and drop specific information-carrying wavelengths propagating within a fiber optic communication network. The stack comprises a first layer comprising a silicon or silica subtrate (10) a second layer , comprising an undercladding layer (20) a third layer comprising a core glass layer (22), and a fourth layer comprising an overcladding layer (24). In another embodiment, the stack comprises a first layer comprising a silicon or silica substrate (10), a second layer comprising an undercladding layer (20) a third layer comprising a polymer layer (26) a fourth layer comprising a , core glass …
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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 September 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2022.
- 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.