External resonator light source
CA 2248501 C · Owner: Ando Electric Co. Ltd. · Inventors: Funakawa, Seiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an external resonator light source which, by removing natural emitted light is able to send, out only light which has an extremely high wavelength purity. As shown in FIG. 1 the present invention's external, resonator light source is provided with a light amplifying element 21; a first light reflecting means 22 disposed to the side of one outgoing light edge surface 21a of the light amplifying element 21; a wavelength selecting element 23 disposed to the side of the other outgoing light edge surface 21b of the light amplifying element 21; and a second light reflecting means 24 which reflects and/or transmits outgoing light 31a from the wavelength selecting …
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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 September 24, 1998 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 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
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.