US5078902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divalent silver halide bactericide
Assignee: N JONAS & Co Inc A Corp OF
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Filing: 1991-05-09
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Granted: 1992-01-07
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Expires: 2011-05-09
Abstract
Abstract Divalent silver halides provide a source for divalent bactericidal silver ions in the presence of persulfate. The halides are especially effective when applied to water used in industrial cooling installations, hot tubs and swimming pools and will conform to stringent EPA requirements for waters utilized for bathing as in tubs and pools of 100% kills of 100 K/cc E. Coli coliforms within 10 minutes, exemplary of which are the chloride and bromide which give 100% kills within 5 minutes. The halides, of course, can be used in salty water since they are solids immune from halide action that would otherwise precipitate soluble divalent silver from solution.
Inventors
- 👤 Marvin S. Antelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:42
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; C02F1/505; C02F2103/00; C02F2103/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
A method for controlling the growth of bacteria in the water of swimming pools, hot tubs and industrial cooling towers which comprises adding a divalent silver halide in the presence of an oxidizing agent so as to provide a source of divalent silver ions.
Claim 2
Independent Claim
44 words
A method for controlling the growth of bacteria in the water of swimming pools, hot tubs and industrial cooling towers which comprises adding a divalent silver halide in the presence of an oxidizing agent so as to provide a source of divalent silver ions.
Claim 3
Dependent Claim
14 words
A method as claimed in claim 1 where the oxidizing agent is a persulfate.
Claim 4
Dependent Claim
23 words
A method according to claim 1 which can be utilized in salt water without causing any precipitation of bactericidally active divalent silver ions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |