Ice melter and method of making same
CA 1340705 C · Owner: Connor, Margaret B. · Inventors: Connor, Margaret B.; Tratnyek, Joseph P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a composition for melting ice at low temperatures, particularly for use in melting ice from driveways, sidewalks and the like. The composition includes mixtures of the salts, sodium and potassium chloride urea, and a chemical enhancer (synergist) or trigger. The enhancer which quickens melt rate and effects lower ice-melting temperatures may be an additional inorganic salt such as a, carbonate or another chloride or an organic compound with, ether or hydroxyl groupings such as saccharides alcohols, glycols, and glucosides. The invention also includes the method of making the composition which includes the steps for example of, (1) preparing a warm solution of urea …
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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
- Granted August 10, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 10, 2016.
- 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.