US3879559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slime control compositions and their use
Assignee: Veolia WTS USA Inc
•
Filing: 1973-08-27
•
Granted: 1975-04-22
•
Expires: 1993-08-27
Abstract
Abstract The present invention relates to certain processes and compositions useful for inhibiting the growth of slime in water and, in particular, water used for industrial purposes; for example, in the manufacture of pulp paper, in the manufacture of paper, in cooling water systems and in effluent water treatment. The novel processes and compositions of the present invention are processes or mixtures which show unexpected synergistic activity against microorganisms, including bacteria, fungi, and algae, which produce slime in aqueous systems or bodies which are objectionable from either and operational or aesthetic point of view. Specifically, the invention is directed to the use of compositions comprising a combination of a mixture of 75 percent of 5-chloro-2-methyl-4-isothiazolin-3-one calcium chloride and 25 percent 2-methyl-4-isothiazolin-3-one calcium chloride and bromonitrostyrene.
Inventors
- 👤 Bernard F Shema
- 👤 Jr Robert H Brink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:14
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; A; A01; A01N; A01N43/00; A01N43/72; A01N43/80
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
49 words
A composition for the control of the microorganism Aerobacter aerogenes in aqueous systems comprising a mixture of 75 percent of 5-chloro-2-methyl-4-isothiazolin-3-1 chloride and 25 percent 2-methyl-4-isothiazolin-3-1 calcium chloride with bromo-nitrostyrene, wherein the weight ratio of the chloride mixture to the bromo-nitrostyrene ranges from about 95:5 to about 5:95 respectively.
Claim 2
Dependent Claim
49 words
A composition for the control of the microorganism Aerobacter aerogenes in aqueous systems comprising a mixture of 75 percent of 5-chloro-2-methyl-4-isothiazolin-3-1 chloride and 25 percent 2-methyl-4-isothiazolin-3-1 calcium chloride with bromo-nitrostyrene, wherein the weight ratio of the chloride mixture to the bromo-nitrostyrene ranges from about 95:5 to about 5:95 respectively.
Claim 3
Dependent Claim
49 words
A COMPOSITION FOR THE CONTROL OF THE MICROORGANISM AEROBACTER AEROGENES IN AQUEOUS SYSTEMS COMPRISING A MIXTURE OF 75 PERCENT OF 5-CHLORO-2-METHYL-4-ISOTHIAZOLIN-3-1 CHLORIDE AND 25 PERCENT 2-METHYL-4-ISOTHIAAZOLIN-3-1 CALCIUM CHLORIDE WITH BROMO-NITROSTYRENE, WHEREIN THE WEIGHT RATIO OF THE CHLORIDE MIXTURE TO THE BROMO-NITROSTYRENE RANGES FROM ABOUT 95:5 TO ABOUT 5:95 RESPECTIVELY.
Claim 4
Dependent Claim
49 words
A COMPOSITION FOR THE CONTROL OF THE MICROORGANISM AEROBACTER AEROGENES IN AQUEOUS SYSTEMS COMPRISING A MIXTURE OF 75 PERCENT OF 5-CHLORO-2-METHYL-4-ISOTHIAZOLIN-3-1 CHLORIDE AND 25 PERCENT 2-METHYL-4-ISOTHIAAZOLIN-3-1 CALCIUM CHLORIDE WITH BROMO-NITROSTYRENE, WHEREIN THE WEIGHT RATIO OF THE CHLORIDE MIXTURE TO THE BROMO-NITROSTYRENE RANGES FROM ABOUT 95:5 TO ABOUT 5:95 RESPECTIVELY.
Claim 5
Dependent Claim
11 words
The composition of claim 1 where said ratio is about 50:50.
Claim 6
Independent Claim
64 words
A method for controlling the growth of the microorganism Aerobacter aerogenes in an aqueous system which comprises adding to said system an effective amount of a composition comprised of a mixture of 75 percent of 5-chloro-2-methyl-4-isothiazolin-3-1 chloride and 25 percent 2-methyl-4-isothiazolin-3-1 calcium chloride with bromo-nitrostyrene, wherein the weight ratio of the chloride mixture to the bromo-nitrostyrene ranges from about 95:5 to about 5:95 respectively.
Claim 7
Independent Claim
64 words
A method for controlling the growth of the microorganism Aerobacter aerogenes in an aqueous system which comprises adding to said system an effective amount of a composition comprised of a mixture of 75 percent of 5-chloro-2-methyl-4-isothiazolin-3-1 chloride and 25 percent 2-methyl-4-isothiazolin-3-1 calcium chloride with bromo-nitrostyrene, wherein the weight ratio of the chloride mixture to the bromo-nitrostyrene ranges from about 95:5 to about 5:95 respectively.
Claim 8
Dependent Claim
11 words
The method of claim 3 where said ratio is about 50:50.
Claim 9
Dependent Claim
38 words
The method of claim 3 wherein said composition is added to said system in an amount of from 0.1 to about 1,000 parts per be weight of said composition per million parts by weight of said aqueous system.
Claim 10
Dependent Claim
23 words
The method of claim 5 where said composition amount is from about 1 to about 100 parts pEr million of said aqueous system.
Claim 11
Dependent Claim
16 words
The method of claim 5 wherein the aqueous system is that of a cooling water system.
Claim 12
Dependent Claim
18 words
The method of claim 5 wherein the aqueous system is that of a pulp and paper mill system.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |