Method for cleaning environmental soils from outdoor unfinished surface
CA 2217609 A1 · Owner: Thompson, Mark · Inventors: Hawes, Charles; Thompson, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of diluting concentrated cleaning composition and cleaning outdoor soiled surfaces with the diluted cleaning composition. The concentrated cleaning solution can include an aqueous chlorinated bleach solution a surfactant, a phosphate, and a silicate. The concentrated cleaning solution is diluted with water to form a diluted composition which is applied to the surfaces to be cleaned to effect loosening of soil. Thereafter, the loosened soil is removed by the mechanical action of a water spray. The cleaning composition can be sprayed onto the surface to be cleaned by a hand held sprayer such as an air-gap or closed venturi type of hose end sprayer.
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 October 8, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2019.
- 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.