Cleaning composition and method
CA 2000938 C · Owner: Gage Products Company · Inventors: Dixon, Donald R.; Maxwell, Jeffrey W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cleaning composition includes a liquid vehicle having dispersed therein, a particulate organic, polymeric, material. This composition is used for cleaning encrustations from the interior surface of tubes or other vessels, particularly those of paint delivery systems. Such cleaning is accomplished by maintaining a flow of the cleaning composition through the vessel. The vehicle may comprise organic or inorganic solvent mixtures and may include detergents, surfactants and similar ancillary ingredients.
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 18, 1989 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2011.
- 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.