US4200606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for sanitizing toilets
Assignee: Procter and Gamble Co
•
Filing: 1978-12-22
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Granted: 1980-04-29
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Expires: 1998-12-22
Abstract
Abstract A method for sanitizing toilets wherein a hypochlorite sanitizing agent and a dye selected from the group consisting of FD & C Blue No. 1 and FD & C No. 3 are dispensed from separate dispensing means into the toilet flush water. The dye is resistant to attack by the hypochlorite and therefore provides an aesthetically pleasing color to the bowl water during the time period between flushes.
Inventors
- 👤 David J. Kitko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:26
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/48; A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/05; C11D3/395; C11D3/40; Y; Y10; Y10S; Y10S4/00; Y10S4/09
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
A method of treating a flush toilet which comprises a flush tank and a bowl, with a hypochlorite sanitizing agent each time the toilet is flushed, and providing a persistent color to the bowl water between flushes, said method comprising the step of dispensing from separate dispensing means, into the flush water; A. an aqueous solution of a compound which produces hypochlorite ions in aqueous solution, and B. a solution of a dye selected from the group consisting of FD&C blue No. 1 and FD&C Green No. 3; the amounts of Component A and Component B, respectively, being such as to produce a concentration of available chlorine of from about 2 ppm to about 10 ppm, a concentration of dye of from about 0.5 to about 5 ppm and a ratio of available chlorine to dye of from about 2:1 to 6:1 in the bowl water after the flush, the pH of the bowl water being from about 8 to about 9.5 after completion of the flush when the dye is FD&C Blue No. 1 and from about 8.5 to about 9.5 when the dye is FD&C Green No. 3.
Claim 2
Independent Claim
190 words
A method of treating a flush toilet which comprises a flush tank and a bowl, with a hypochlorite sanitizing agent each time the toilet is flushed, and providing a persistent color to the bowl water between flushes, said method comprising the step of dispensing from separate dispensing means, into the flush water; A. an aqueous solution of a compound which produces hypochlorite ions in aqueous solution, and B. a solution of a dye selected from the group consisting of FD&C blue No. 1 and FD&C Green No. 3; the amounts of Component A and Component B, respectively, being such as to produce a concentration of available chlorine of from about 2 ppm to about 10 ppm, a concentration of dye of from about 0.5 to about 5 ppm and a ratio of available chlorine to dye of from about 2:1 to 6:1 in the bowl water after the flush, the pH of the bowl water being from about 8 to about 9.5 after completion of the flush when the dye is FD&C Blue No. 1 and from about 8.5 to about 9.5 when the dye is FD&C Green No. 3.
Claim 3
Dependent Claim
33 words
The method of claim 1 wherein the respective solutions A and B are substantially completely isolated from the flush water in the toilet tank during the quiescent period between flushes of the toilet.
Claim 4
Dependent Claim
29 words
The method of claim 2 wherein the sanitizing agent which produces hypochlorite in aqueous solution is selected from the group consisting of calcium hypochlorite, lithium hypochlorite and mixtures thereof.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein the dye is FD&C Blue No. 1.
Claim 6
Dependent Claim
13 words
The method of claim 3 wherein the dye is FD&C Green No. 3.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |