Thickened aqueous cleaning compositions and methods of use
CA 2110033 C · Owner: Choy, Clement K. · Inventors: Choy, Clement K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aqueous cleaning compositions and methods of use are disclosed with a thickening agent including an alkyl ether sulfate surfactant forming about 0.1 to about 10 % by wt. of the composition a solvent selected from the class consisting of terpene derivatives including a functional group and tertiary alcohols forming about 0.01 to about 10 % by wt. of the composition and an electrolyte component in an amount effective for enhancing thickening effects of the alkyl ether sulfate surfactant and solvent. The electrolyte component preferably includes a hypochlorite of an alkali metal and more preferably at least one additional multivalent electrolyte, the additional multivalent electrolyte most …
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 21, 1992 and granted August 26, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2014.
- 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.