Expired Canadian patentCanada
Metal detector for detecting product impurities
CA 1269736 C · Owner: Kerr, Bruce G. · Inventors: Kerr, Bruce G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a metal detector, such as may be used in a bakery, an adjustable phase shifter is provided to adjust the detectors for different products. The adjustable phase shifter is controlled electroncially from the output signal so that the arrangement is selfadjusting.
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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
- Granted May 29, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 30, 1987
GrantedMay 29, 1990
Term endedMay 29, 2007
Patent numberCA 1269736 C
Classification (IPC)G01N27/72 +2 more
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.