Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Reexamination Certificate
1999-10-25
2001-04-10
Del Cotto, Gregory R. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
C510S191000, C510S238000, C510S421000, C510S422000, C510S423000, C510S427000, C510S433000, C510S434000, C510S499000, C510S503000, C510S504000
Reexamination Certificate
active
06214784
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a hard surface cleaner especially effective on bathroom soils, such as soap scum.
2. Brief Statement of the Related Art
A number of hard surface cleaners have been specially formulated to target bathroom soils. These include products containing liquid hypochlorite for combating mildew and fungus; products with quaternary ammonium compounds as bacteriostats; and acidic cleaners, such as those containing phosphoric or other strong mineral acids.
These cleaners will typically include buffers, dyes, fragrances, and the like in order to provide performance and/or aesthetic enhancements.
Graubart et al., U.S. Pat. No. 5,454,984, discloses a cleaning composition comprising quaternary ammonium compounds, tetrasodium EDTA, a mixture of surfactants, and a glycol ether. However, the reference fails to teach, disclose or suggest the use of potassium EDTA as a chelating agent.
Garabedian et al., U.S. Pat. Nos. 5,252,245, 5,437,807 and 5,468,423, and Choy et al., U.S. patent application Ser. No. 08/410,470, filed Mar.24, 1995, all of common assignment herewith, disclose improved glass and surface cleaners which combine either amphoteric or nonionic surfactants with solvents and effective buffers to provide excellent streaking/filming characteristics on glass and other smooth, glossy surfaces. These disclosures are incorporated herein by reference thereto.
Co-pending application Ser. No. 08/507,543, filed Jul. 26, 1995, now U.S. Pat. No. 6,013,615 of Zhou et al., entitled “Antimicrobial Hard Surface Cleaner,” of common assignment, discloses and claims an antimicrobial hard surface cleaner which includes amine oxide, quaternary ammonium compound and tetrasodium EDTA, in which a critical amine oxide: EDTA ratio results in enhanced non-streaking and non-filming performance.
Co-pending application Ser. No. 08/605,822, filed Feb. 23, 1996, now U.S. Pat. No. 5,767,055 of Choy et al., entitled “Composition and Apparatus for Surface Cleaning,” of common assignment, discloses and claims a hard surface cleaner which uses a dual chamber delivery system, one chamber containing an oxidant solution and the other, a combination of chelating agents and surfactants.
Co-pending application Ser. No. 08/632,041, filed Apr. 12, 1996, now U.S. Pat. No. 5,814,591 of Mills et al., entitled “Hard Surface Cleaner with Enhanced Soil Removal,” of common assignment, discloses and claims a hard surface cleaner which includes surfactants and tetraammonium EDTA for proficient soap scum and soil removal.
However, none of the art discloses, teaches or suggest the use of tetrapotassium EDTA as an effective chelating agent which additionally surprisingly enhances the soil removing, especially soap scum-removing, ability of the liquid, one phase cleaners formulated therewith. Additionally, unlike some of the prior chelating agents, tetrapotassium EDTA has very low to no odor, which is a significant beneficial attribute to the inventive cleaners hereof. Moreover, none of the art discloses, teaches or suggests the unexpected speed at which the inventive cleaners work.
SUMMARY OF THE INVENTION AND OBJECTS
The invention provides an aqueous, hard surface cleaner, said cleaner comprising:
an aqueous hard surface cleaner with improved soil, especially soap scum, removal comprising:
(a) either an anionic, nonionic, amphoteric surfactant, and mixtures thereof with optionally, a quaternary ammonium surfactant, said surfactants being present in a cleaning—effective amount;
(b) at least one water-soluble or dispersible organic solvent having a vapor pressure of at least 0.001 mm Hg at 25° C., said at least one organic solvent present in a solubilizing—or dispersion—effective amount;
(c) Tetrapotassium ethylenediamine—tetraacetate (potassium EDTA) as a chelating agent, said potassium EDTA present in an amount effective to enhance soil removal in said cleaner; and
(d) the remainder, water.
The invention further comprises a method of cleaning soils, especially soap scum from hard surfaces by applying said inventive cleaner to said soap scum, and removing both from said surface.
It is therefore an object of this invention to improve soil, especially soap seum, removal from hard surfaces.
It is another object of this invention to markedly increase the speed in which such soils, especially soap scum, are removed from the hard surface cleaned.
It is also an object of this invention to provide a hard surface cleaner for bathroom soils, which include oily and particulate soils.
It is a further object of this invention to provide a low to no odor hard surface cleaner.
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FWC (filed Feb. 27, 1997) of previously filed U.S. Patent Application Ser. No. 08/507,543, Jul. 26, 1995, “Antimicrobial Hard Surface Cleaner,” Zhou et al.
U.S. Patent Application Ser. No. 08/605,822, Feb. 23, 1996, “Composition and Apparatus for Surface Cleaning,” Choy et al.
U.S. Patent Application Ser. No. 08/632,041, Apr. 12, 1996, “Hard Surface Cleaner with Enhanced Soil Removal,” Mills et al.
Julian Jennifer C.
Robbins Michael H.
Del Cotto Gregory R.
Hayashida Joel J.
The Clorox Company
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