Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing
Reexamination Certificate
2008-05-27
2008-05-27
Douyon, Lorna M. (Department: 1796)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
C510S116000, C510S191000, C510S220000, C510S238000, C510S276000, C510S375000, C510S379000, C134S042000
Reexamination Certificate
active
07378380
ABSTRACT:
A dilutable cleaning composition comprises a pH-elevating component and a pH-lowering component, the composition being such that when it is mixed with water the pH-elevating component dissolves or disperses in the water thereby elevating the pH of the water to at least 8.5 and subsequently the pH-lowering component dissolves or disperses in the water, thereby lowering the pH of the water from at least 8.5 to not more than 4. When the water is at the raised pH, the cleaning composition is effective in removing proteinaceous or fatty soiling, and when the composition is at the lowered pH, the composition is effective at removing alkaline waste materials such as limescale. The cleaning composition is particularly suitable for use as a lavatory or hard surface cleaner.
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Gyula Rabai et al, Chaotic pH Oscillations in the Hydrogen Peroxide—Thiosulfate-Sulfite Flow System, J. Physical Chemistry A 1999, 103, 7268-7273.
Blagg Adrian
Lang Angus
McKechnie Malcolm Tom
Douyon Lorna M.
Norris McLaughlin & Marcus PA
Reckitt Benckiser (UK) Limited
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