Powder concentration measuring apparatus and automatic powder spray amount control system using the same
CA 2488694 A1 · Owner: Iwase, Yuji · Inventors: Iwase, Yuji; Hayakawa, Kimiaki; Yoshimoto, Hirokazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A powder density measuring device where a pair of purge gas-introducing paths is provided in a direction transverse to a material-measuring path in which pneumatically transported powder is introduced and a pair of light , transmission windows is provided so that the material-measuring path is viewable through the pair of the purge gas-introducing paths. A light projector is provided at one of the light transmission windows and a light receiver is provided at the other window so as to be opposed to each other. Powder density calculating/controlling means is provided and, when a light , beam radiated from the light projector is radiated to inside the material- measuring path, 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 May 30, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2025.
- 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.