US4187183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed-form polyhalide resins for disinfecting water
Assignee: Aqua Chem Inc
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Filing: 1978-06-29
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Granted: 1980-02-05
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Expires: 1998-06-29
Abstract
Abstract A strongly basic anion-exchange resin loaded with iodine and a less than stoichiometric amount of an iodide salt or bromine and a less than stoichiometric amount of bromide salt is an effective demand bactericide for disinfecting water. The bactericidal resin according to the invention elutes only small amounts of halide ions and is especially suited for killing bacteria in feed water supplies having relatively high salt content.
Inventors
- 👤 Gary L. Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:22
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/766; A; A01; A01N; A01N59/00; A01N59/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A mixed-form polyhalide bactericidal resin comprising a strong base anion-exchange resin having anion exchange sites and having attached to a predominant number of such sites polyhalide anions of the following formulas: a(I.sub.3.sup.-) and b(I.sub.5.sup.-); wherein: a=0.4 to 0.8 of the exchange sites; b=0.1-0.3 of the exchange sites; a+b=a predominant number of the anion sites available for exchange; and a+2(b) equals or exceeds 1.0.
Claim 2
Dependent Claim
63 words
A mixed-form polyhalide bactericidal resin comprising a strong base anion-exchange resin having anion exchange sites and having attached to a predominant number of such sites polyhalide anions of the following formulas: a(I.sub.3.sup.-) and b(I.sub.5.sup.-); wherein: a=0.4 to 0.8 of the exchange sites; b=0.1-0.3 of the exchange sites; a+b=a predominant number of the anion sites available for exchange; and a+2(b) equals or exceeds 1.0.
Claim 3
Dependent Claim
11 words
The resin as claimed in claim 1 wherein a=0.6 and b=0.2.
Claim 4
Dependent Claim
16 words
The resin as claimed in claim 1 wherein said resin is a quanternary ammonium anion-exchange resin.
References Cited (Backward Citations)
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US3136716A
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US3346446A
Cited
US3425790A
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US3462363A
Cited
US3817860A
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US3872013A
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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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |