Liquid for producing marker vapour, a method of producing marker vapour and a method of inspection with marker vapour
CA 2279147 C · Owner: Banyard, Richard Leslie · Inventors: Banyard, Richard Leslie; Dykes, Ronald Matthew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid for producing a marker vapour includes a fluorescent substance in solution in a carrier liquid. The fluorescent substance has a first vaporization temperature range at which the fluorescent substance vaporizes. The carrier liquid has a second vaporization temperature range at which the carrier liquid vaporizes. The second vaporization temperature range overlaps the first vaporization range. The liquid is vaporized and directed into a body being inspected. Leaks then become visible when the body is inspected using radiation of a wavelength that causes the fluorescent substance to fluoresce.
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 July 29, 1999 and granted February 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2021.
- 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.