Temperature compensated insensitive optical multiplexor/demultiplexor
CA 2255386 C · Owner: Delisle, Vincent · Inventors: Teitelbaum, Neil; Delisle, Vincent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wavelength demultiplexing device has a first monolithic waveguide block and , a, second monolithic waveguide block. spaced from the first block to receive optical signals, from the first block. The first monolithic waveguide block has an integrated means for, separating an input beam into sub-beams having different central wavelengths. The, second monolithic waveguide block. has closely spaced waveguides for receiving wavelengths of light corresponding to at least some of the sub-beams of light. A, temperature compensator is provided in one of the second monolithic waveguide block, and the first block for coupling the predetermined wavelengths of light emanating from, the first …
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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 December 4, 1998 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2020.
- 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.