Monochromator and optical spectrum analyzer using the same
CA 2410330 A1 · Owner: Kaneko, Tsutomu · Inventors: Kaneko, Tsutomu; Yamamoto, Toshikazu; Mori, Tohru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A monochromator including: a concave mirror which converts incident light into parallel light and emits the parallel light, a plane diffraction grating for diffracting the parallel light emitted from the concave mirror first, reflection means which reflects first light diffracted by the plane diffraction grating and causes the diffracted light to enter the plane diffraction grating as second incident light second reflection means which reflects second diffracted light and causes the reflected light to enter the plane diffraction grating as third incident light, and an exit slit disposed in the vicinity of a focal paint such that third diffracted light is reflected by the first reflection …
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 October 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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.