US5209934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zebra mussel control chemical
Assignee: ChampionX LLC
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Filing: 1992-06-09
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Granted: 1993-05-11
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Expires: 2012-06-09
Abstract
Abstract Zebra Mussels can be controlled by treating the waters in which they grow with a composition comprising the combination of a chlorine solution and a bromide salt capable of releasing bromide ions to the chlorine solution.
Inventors
- 👤 Edward W. Ekis, Jr.
- 👤 Andrew J. Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:38
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/766; Y; Y10; Y10S; Y10S210/00; Y10S210/931
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
A method for controlling and preventing the growth and attachment of Zebra mussels to piping, heat exchange cooling water surfaces, and other cooling system materials constructed in contact with water containing Zebra mussels, the method comprising the step of intermittently treating the water with a low molecular weight, nonionic surface active biodispersant and a combination of chlorine and water-soluble bromide salts, the chlorine and bromide salts being added to the waters in a concentration of from 0.05 to 10 milligrams per liter of water, where the ratio of bromide salt to chlorine as hypochlorous acid is from about 0.25 to about 1.5 equivalent, whereby the intermittent addition of the surface active biodispersants, chlorine and bromide salts prevent the growth and attachment of a juvenile Dreissena Polymorpha form of the Zebra mussel on said surfaces.
Claim 2
Independent Claim
134 words
A method for controlling and preventing the growth and attachment of Zebra mussels to piping, heat exchange cooling water surfaces, and other cooling system materials constructed in contact with water containing Zebra mussels, the method comprising the step of intermittently treating the water with a low molecular weight, nonionic surface active biodispersant and a combination of chlorine and water-soluble bromide salts, the chlorine and bromide salts being added to the waters in a concentration of from 0.05 to 10 milligrams per liter of water, where the ratio of bromide salt to chlorine as hypochlorous acid is from about 0.25 to about 1.5 equivalent, whereby the intermittent addition of the surface active biodispersants, chlorine and bromide salts prevent the growth and attachment of a juvenile Dreissena Polymorpha form of the Zebra mussel on said surfaces.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the surface active biodispersant has an HLB value of from 4 to about 10.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein the surface active biodispersant is added separately to the water containing zebra mussels.
Claim 5
Dependent Claim
55 words
The method of claim 1 wherein the surface active biodispersant is at least one biodispersant selected from the group consisting of ethylene oxide condensates with propylene oxide adducts, propylene glycols, nonionic polyethoxylated straight chain alcohols, tris cyanoethylated cocodiamines, polyoxyethylene sorbitan esters or acids, nonionic N,N, dimethyl stearamides, nonionic amine polyglycol condensates, and nonionic ethyoxylated alcohols.
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) | 1996-05-10 | 1996-11-09 | 1997-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-10 | 2000-11-09 | 2001-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-10 | 2004-11-09 | 2005-05-11 | $7700.00 | Window Closed / Lapsed |