Engine and radiator coolant treatment and handling, enabling coolant reuse
CA 2089616 C · Owner: Wooley, Geoffrey H. · Inventors: Dixon, Patrick L.; Wooley, Geoffrey H.; Lubberts, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The method of treating used liquid coolant employed in the coolant passages of an engine or radiator, and employing a coolant pumping structure that includes providing a source of supply coolant liquid, and a used coolant reservoir; operating the pumping structure to displace supply coolant liquid from the source into the coolant passages thereby, displacing used coolant from the passages for flow into the reservoir structure; and chemically treating the used coolant liquid to remove metallic and other contaminants therefrom, thereby to produce treated coolant liquid usable as the supply coolant liquid.
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 February 16, 1993 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2015.
- 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.