US4379137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disinfecting and preserving composition comprising a synergistic combination of a polymeric quaternary ammonium compound and a 3-isothiazolone compound
Assignee: STWB Inc
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Filing: 1980-07-28
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Granted: 1983-04-05
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Expires: 2000-07-28
Abstract
Abstract The invention is a synergistic disinfecting and preserving composition comprising in admixture a polymeric quaternary ammonium compound and a 3-isothiazolone derivative, and a method of use thereof, for protecting aqueous systems against contamination by deleterious microorganisms.
Inventors
- 👤 Helmut H. Ehlers
- 👤 Heinz Eggensperger
- 👤 Lothar Bucklers
- 👤 Ulrich Eigener
- 👤 Karl-Heinz Diehl
- 👤 Norbert Weigand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:01
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; A; A01; A01N; A01N43/00; A01N43/72; A01N43/80
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
58 words
A synergistic bactericidal composition comprising in admixture (a) a mixture of polymeric quaternary ammonium compounds having the formula ##STR7## where A is --CH 2 CH═CH--CH 2 -- and n is a number from 2 to 30; and (b) a mixture of 5-chloro-2-methyl-3-isothiazolone and 2-methyl-3-isothiazolone; wherein the ratio of component (a) to component (b) is about 1:1 to 2:1.
Claim 2
Dependent Claim
58 words
A synergistic bactericidal composition comprising in admixture (a) a mixture of polymeric quaternary ammonium compounds having the formula ##STR7## where A is --CH 2 CH═CH--CH 2 -- and n is a number from 2 to 30; and (b) a mixture of 5-chloro-2-methyl-3-isothiazolone and 2-methyl-3-isothiazolone; wherein the ratio of component (a) to component (b) is about 1:1 to 2:1.
Claim 3
Dependent Claim
38 words
A method of protecting an aqueous system which is susceptible to contamination by deleterious bacteria from contamination by said bacteria which comprises treating the aqueous system with a bactericidally effective amount of the composition according to claim 1.
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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) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |