Wavelength separating and light condensing type generating and heating apparatus
CA 2201733 C · Owner: Izumi, Hisao · Inventors: Izumi, Hisao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To conduct generating electricity and heating by utilizing solar rays, the solar rays are separated to short wavelength and long wavelength which are separately converged to increase the efficiency of generating and heating. To separate the sunlight, it is preferable to use a semi-transparent mirror for reflecting the short wavelength and for passing the long wavelength. Further, it is preferable that the semi-transparent mirror may act as an optical system for converging the short wavelength.
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 3, 1995 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 3, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 2017.
- 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.