| US 7,563,755 B2 | ||
| Lavatory freshening and/or cleaning system and method | ||
| Timothy I. Moodycliffe, Milwaukee, Wis. (US); and Jerome J. Veltman, Racine, Wis. (US) | ||
| Assigned to S. C. Johnson & Son, Inc., Racine, Wis. (US) | ||
| Appl. No. 10/332,601 PCT Filed Jul. 11, 2001, PCT No. PCT/US01/21789 § 371(c)(1), (2), (4) Date Jun. 12, 2003, PCT Pub. No. WO02/04592, PCT Pub. Date Jan. 17, 2002. |
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| Claims priority of application No. 0017151.2 (GB), filed on Jul. 12, 2000. | ||
| Prior Publication US 2004/0019961 A1, Feb. 05, 2004 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C11D 17/00 (2006.01); A62C 13/62 (2006.01) | ||
| U.S. Cl. 510—191 [510/192; 510/462; 510/506; 510/510; 239/302; 239/310; 239/316] | 3 Claims |
| 1. A lavatory freshening and/or cleaning system comprising a dispenser for dispensing a liquid composition from under the
rim of a lavatory bowl from a reservoir suspended from the rim, said liquid composition comprising one or more foaming surfactants
having a total concentration not exceeding 8 wt. %; wherein said liquid composition further comprises perfume present within
the range 4 to 15 wt. % and a thickening agent and a phosphonate sequestrant; and
wherein the surfactant and perfume in combination act to thicken the liquid composition apart from thickening effects of the
thickening agent, and the concentration of said thickening agent as a percentage of the liquid composition, apart from the
surfactant and perfume present in the liquid composition, is within the range 0.4 to 5 wt. %; and
wherein said thickening agent is a hydroxyethylcellulose thickening agent;
wherein the dispenser has a plate having a capillary channel for controlling dispensing of the liquid composition or a pad
for controlling dispensing of the liquid composition; and
wherein the composition further comprises dipropylene glycol in an amount sufficient to prevent phase separation of the perfume
from the composition.
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