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US 4,304,610 AGranted
Carpet cleaning method
AssigneeS. C. Johnson & Son, Inc.
InventorHubert C. Weisensel
Life of this patent
Estimating the term…
Abstract
A carpet which contains residues of high foaming anionic surfactants is cleaned, and foam formation simultaneously inhibited, by contacting the carpet with an aqueous cleaning composition containing a cationic surfactant and then vacuuming the composition from the carpet; the cationic surfactant being one which is incompatible with the high foaming anionic surfactants.
Claims5
In a process for simultaneously cleaning a carpet which contains residues of high foaming anionic surfactants using a water extraction system and providing foam control which comprises:
- (a) spraying the carpet with a cleaning dispersion of a concentrate cleaning composition mixed with water in a ratio of one part concentrate to 4 parts water to one part concentrate to 256 parts water, the water having a temperature within the range of from 50.degree. to 200.degree. F.;
- (b) Substantially simultaneously removing the cleaning dispersion from the carpet using a vacuum with a water lift rating of 100 inches to 250 inches,
- the improvement which comprises controlling foam formation caused by said residue of high foaming anionic detergents by using as the cleaning dispersion a composition which includes from 0.01 to 3.75% by weight of a low-foaming cationic surface active agent which is incompatible with anionic detergents.
Dependencies are inferred from the claim text.