Patent US4295932A successfully refreshed from Google Patents.
US4295932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synergistic blend of biocides
Assignee: ChampionX LLC
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Filing: 1980-07-14
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Granted: 1981-10-20
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Expires: 2000-07-14
Abstract
Abstract A method for controlling the microorganism in aqueous systems comprising treating such systems with a biocidal amount of a mixture of 75% of 5-chloro-2-methyl-4-isothiazolin-3-one and 25% 2-methyl-4-isothiazolin-3-one with chlorine or chlorine dioxide.
Inventors
- 👤 Frances C. Pocius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:26
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/008; A; A01; A01N; A01N59/00; C; C02; C02F; C02F1/00; C02F1/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A method for controlling aqueous systems heavily contaminated with microorganisms comprising treating such systems with 0.5-10 ppm of a mixture of 75% of 5-chloro-2-methyl-4-isothiazolin-3-one and 25% 2-methyl-4-isothiazolin-3-one and an effective amount of chlorine or chlorine dioxide, such amount being substantially effective with said mixture to control microorganisms in the aqueous system.
Claim 2
Independent Claim
51 words
A method for controlling aqueous systems heavily contaminated with microorganisms comprising treating such systems with 0.5-10 ppm of a mixture of 75% of 5-chloro-2-methyl-4-isothiazolin-3-one and 25% 2-methyl-4-isothiazolin-3-one and an effective amount of chlorine or chlorine dioxide, such amount being substantially effective with said mixture to control microorganisms in the aqueous system.
Claim 3
Dependent Claim
9 words
The method of claim 1 where chlorine is used.
Claim 4
Dependent Claim
10 words
The method of claim 1 where chlorine dioxide is used.
Claim 5
Dependent Claim
18 words
The method of claim 1 where there is also present with such mixture 0.5-50 ppm of a biodispersant.
Claim 6
Dependent Claim
40 words
The method of claim 1 where the biodispersant is a propylene oxide-ethylene oxide block copolymer, which polymer comprises polyoxypropylene glycol polymer having a molecular weight of from 1500-200 which has been reacted with from 5-50% by weight of ethylene oxide.
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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |