Detection of an anticorrosion oil applied into a ship's ballast
CA 2034672 C · Owner: Gamache, Roger A. · Inventors: Gamache, Roger A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for detecting the presence of any discontinuity in an anticorrosion oil coating applied onto the internal walls of a nautical ballast. The method comprises the steps of (1) adding an oil-soluble tracer to the anticorrosion oil coating prior to its application onto the internal walls of the ballast, the tracer being insoluble in water and rust; inert to rust, water and the oil; and capable of emitting visible light under the effect of a black light; (2) after application of the oil coating, submitting the inside walls coated with the oil to the effect of a black light and (3), checking the continuity of the visible light that is emitted by the oil coating, whereby the presence of …
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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 January 21, 1991 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 2013.
- 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.