Non-oil based sweeping compound
CA 2121397 C · Owner: Steinhauser, Norbert J. · Inventors: Steinhauser, Norbert J.; Ossian, Kenneth C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A floor sweeping composition including a floor sweeping carrier and a liquid hygroscopic alkali or alkaline earth salt solution, preferably selected from the group of magnesium chloride and calcium chloride. The liquid enhances the effectiveness of the sweeping composition and its ability to collect and remove fine dust materials.
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 April 15, 1994 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 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.