Optical device having nonmonotonic transfer function and applications using same
CA 2433934 A1 · Owner: Johnson, Erik V. · Inventors: Sargent, Edward H.; Johnson, Erik V.; Brzozowski, Lukasz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An entirely passive all-optical device referred to as an optical hard , limiter consists of alternating layers of materials having oppositely signed Kerr coefficients and substantially different linear indices of refraction wherein the higher linear index material has the negative Kerr coefficient and the lower linear index material has the positive Kerr coefficient. The optical device has two distinct transmittance curves. Various optical devices and systems can be built from such optical hard limiters.
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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 February 8, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2024.
- 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.