Non-contact wet or dry film thickness measuring device
CA 2029182 A1 · Owner: Fountain, Frank Spratt · Inventors: Fountain, Frank Spratt; Pusey, Donald Kirk; Falcoff, Allan Frohm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for measuring the thickness of a wet or dry paint film applied on a substrate without contacting the film is disclosed. The device uses an optical sensor positioned centrally and coaxially with an inductive eddy-current proximity sensor. The optical sensor measures the distance between the device and the upper surface of the paint film at specular reflection angle. The proximity sensor measures the distance between the device and the upper surface of the substrate. The two distances measured when compared, produce the film thickness value. The device is capable of accurately measuring thickness of various paint films, such as flat, glossy and metal-flake containing paint films. 16
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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
- Filed November 2, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2012.
- 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.