US4780216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium hypochlorite sanitizing compositions
Assignee: Olin Corp
•
Filing: 1986-11-19
•
Granted: 1988-10-25
•
Expires: 2006-11-19
Abstract
Abstract A sanitizing composition consisting essentially of a mixture of a calcium hypochlorite compound and a peroxydisulfate compound having the formula: MxS2O8 where M is an alkali metal or alkaline earth metal, and x is 1 or 2 is employed in treating water to improve pH control and provide increased removal of organic materials. The compositions provide improved sanitation of water in swimming pools, spas, and cooling towers by efficiently oxidizing organic impurities while helping to minimize the increase in the pH of the water. This permits a reduction in the amount and frequency of addition of acidic compounds such as hydrochloric acid to the water bodies. Further, the incorporation of additives such as algaecides, dispersants, and clarifying agents provides for significant improvements in water quality as evidenced by sparkling pure water.
Inventors
- 👤 John A. Wojtowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:33
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; C02F1/72; C02F1/722; C02F2103/00; C02F2103/42
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
42 words
A sanitizing composition consisting essentially of a mixture of a calcium hypochlorite compound and a peroxydisulfate compound having the formula: M x S 2 O 8 where M is an alkali metal or alkaline earth metal, and x is 1 or 2.
Claim 2
Dependent Claim
42 words
A sanitizing composition consisting essentially of a mixture of a calcium hypochlorite compound and a peroxydisulfate compound having the formula: M x S 2 O 8 where M is an alkali metal or alkaline earth metal, and x is 1 or 2.
Claim 3
Dependent Claim
20 words
The sanitizing composition of claim 1 in which the calcium hypochlorite compound is anhydrous calcium hypochlorite or hydrated calcium hypochlorite.
Claim 4
Dependent Claim
17 words
The sanitizing composition of claim 1 in which M is an alkali metal and x is 2.
Claim 5
Dependent Claim
23 words
The sanitizing composition of claim 1 in which the concentration of peroxydisulfate compound is from about 1 to about 50 percent by weight.
Claim 6
Dependent Claim
31 words
The sanitizing composition of claim 4 in which the calcium hypochlorite compound is a hydrated calcium hypochlorite having a water content of from about 4 to about 15 percent by weight.
Claim 7
Dependent Claim
15 words
The sanitizing composition of claim 3 in which the alkali metal is sodium or potassium.
Claim 8
Dependent Claim
12 words
The sanitizing composition of claim 1 in which an algaecide is included.
Claim 9
Dependent Claim
13 words
The sanitizing composition of claim 1 in which a clarifying agent is included.
Claim 10
Dependent Claim
12 words
The sanitizing composition of claim 1 in which a dispersant is included.
Claim 11
Dependent Claim
15 words
The sanitizing composition of claim 1 in which the mixture is in a compressed form.
Claim 12
Dependent Claim
12 words
The sanitizing composition of claim 1 in which a flocculant is included.
Claim 13
Dependent Claim
15 words
The sanitizing composition of claim 3 in which an algaecide and a dispersant are included.
Claim 14
Dependent Claim
30 words
A method of sanitizing water in facilities selected from the group consisting of swimming pools, spas, and cooling towers which comprises contacting the water with the composition of claim 1.
Claim 15
Dependent Claim
42 words
In a calcium hypochlorite composition for sanitizing water the improvement which consists of admixing a peroxydisulfate compound having the formula M x S 2 O 8 where M is an alkali metal or alkaline earth metal and x is 1 or 2.
Claim 16
Dependent Claim
42 words
In a calcium hypochlorite composition for sanitizing water the improvement which consists of admixing a peroxydisulfate compound having the formula M x S 2 O 8 where M is an alkali metal or alkaline earth metal and x is 1 or 2.
References Cited (Backward Citations)
US29473A
Cited
US3232869A
Cited
USRE29473E
Cited
US3702398A
Cited
US4005031A
Cited
US4492618A
Cited
US4532063A
Cited
US4698124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |