Process for fluorimetric monitoring of functional coatings and compositions and fluorescent agents therefor
CA 1292592 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Melancon, Kurt C.; Tiers, George V.D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for monitoring the coating weight uniformity, defects or markings present in a coating of a composition applied to a substrate comprises the steps: a) providing a substrate with a functional coating of a composition comprising an effective amount of uvescer that absorbs radiant energy i.e. has an excitation energy, of wavelength .lambda.1 and emits radiant energy of wavelength .lambda.2; b) scanning the coating with radiant energy having a wavelength within wavelength .lambda.1; c) detecting the radiant energy of wavelength .lambda.2 emitted by the coating; and, d) optionally correlating the emitted radiant, energy to independently measured standard coating weights or thicknesses, …
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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 November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
- 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.