Liquid de-icer production apparatus and method
CA 2382160 C · Owner: Kephart, Edward L. · Inventors: Kephart, Edward L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for automatically producing a desired specific gravity of a salt solution used for deicing highways. Highway departments can produce a high, volume of salt solution of a desired specific gravity by a machine that automatically feeds, salt and water into a hopper tank to produce brine then automatically , measures and, adjusts the specific gravity of the brine by adding greater or lesser amounts of fresh water, to the brine removed from the hopper tank. The salt added to the hopper tank contains, impurities, which are removed by self-cleaning strainers. The sediment so removed flows, to a trash tank. Sediment in the trash tank settles to the bottom thereof and …
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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 26, 2002 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2024.
- 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.