Method and apparatus for detecting thickness variations in sheet material
CA 2078727 A1 · Owner: Scantech Electronics Inc. · Inventors: Nemeth, Karoly G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The detection of thickness variations in sheet material, more specifically the presence or absence of labels on a moving web, is accomplished by providing two spaced apart nozzles, an entry for pressurized fluid first and second conduits to connect the entry and the nozzles, and a differential pressure sensing element connected between the conduits so as to detect a mismatch between the fluid pressures in the two conduits.
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 September 21, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2014.
- 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.