Color-sorting machine for granular materials
CA 2235302 C · Owner: Ito, Takafumi · Inventors: Ito, Takafumi; Satake, Satoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A color-sorting machine for granular materials (1) optically detects raw material grains (G) falling along a substantially fixed path (A) and sorts out no-good grains by color. An optical detection unit (21; 230) to this end comprises a condenser lens (9; 90) a plurality, of optical filters (10a, 10b; 100a 100b, 100c), and a, plurality of light-receiving sensors (12A 13B; 120a, 120b, 120c) corresponding to the filters and can detect a plurality of wavelengths. The light-receiving sensors (12A 13B; 120a, 120b, 120c) lie side by side on the same plane are formed in a unit body, require no positioning adjustment among the light-receiving sensors, and make it possible to reduce the size of the …
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 April 20, 1998 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 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.