Method of introducing leak detection fluid
CA 2197495 C · Owner: Lu, Ling · Inventors: Lu, Ling; Cooper, B. William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of introducing a leak detection additive (48) into a closed refrigeration system (10) by a substrate containing the additive (48). A predetermined amount of the additive (48) is implanted on and absorbed into a host swatch (52) of substrate material which is capable of absorbing and releasing the leak detection additive (48) but which does not react with , refrigerant or system lubricant. The swatch (52) is installed in a desiccant bag (40), which is then installed in a dehydrator (30) of the refrigeration system (10). The refrigeration system (10) is assembled charged and operated, by which the refrigerant and system lubricant flowing through the desiccant bag (40) mixes …
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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 April 6, 1995 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2017.
- 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.