N x m optical switch
CA 2311883 A1 · Owner: Cohen, Adam D. · Inventors: Farries, Mark; Cohen, Adam D.; Copner, Nigel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical switch is disclosed having 4-ports. The switch consists of a first GRIN lens, having 2 ports (1 and 3) adjacent its outwardly facing end face on opposite , sides of an, optical axis of the lens. A second GRIN lens is disposed to receive light from the first, GRIN lens and has two ports (2 and 4) adjacent its outer end face on opposite , sides of an, optical axis. In a first state a first port (1) from the first GRIN lens couples light with, port (2) of the second GRIN lens and a second port (3) of the first GRIN lens simultaneously couples light with another port (4) of the second GRIN lens. A movable, optical element, that when disposed in the path between first and second …
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
- Filed June 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 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.