Wavelength division multiplexing/demultiplexing devices using diffractive optic lenses
CA 2380512 A1 · Owner: Wade, Robert K. · Inventors: Wade, Robert K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved wavelength division multiplexing device (10) is disclosed. The improved wavelength division multiplexing device (10) has a diffraction grating (18) for combining a plurality of monochromatic optical beams (24) into a multiplexed, polychromatic optical beam. The improvement in the improved wavelength division multiplexing device (10) is the use of a diffractive optic collimating/focusing lens (16) for collimating the plurality of monochromatic optical beams (24) traveling along a first direction (24') to the diffraction grating (18), and for focusing the multiplexed polychromatic , optical beam (26') traveling along a second direction (26) from the diffraction grating …
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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 31, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 31, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 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
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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.