Multi-functional optical isolator
CA 2273538 A1 · Owner: Scientific-Atlanta, Inc. · Inventors: Anthon, Douglas W.; Sipes, Donald L. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-functional optical isolator that couples radiation from a plurality of input, fibers to a plurality of output fibers such that an optical beam emitted from any particular, input fiber is transmitted only to its corresponding output fiber. Additionally, an optical, beam emitted in the reverse direction from any output fiber is not transmitted back into, any of the input or output fibers. The multi-functional optical isolator includes a first, focusing lens that collimates the optical radiation emitted from the input fibers and causes, them to pass through an optical isolator. The optical isolator has polarizing elements and, a magneto-optic polarization rotator. A second …
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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 June 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2021.
- 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.