US4369121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for the control of dust
Assignee: ENCLEAN SPECIALTY CHEMICALS Inc ("ENCLEAN") A CORP OF DE
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Filing: 1981-06-18
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Granted: 1983-01-18
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Expires: 2001-06-18
Abstract
Abstract An aqueous solution containing a cellulose ether in an amount of from about 0.25 to about 2.0% by weight and a wetting agent of from about 0.10 to about 0.5% by weight is described. The solution may be applied to stockpiles of aggregate materials at a rate of from about 0.05 to about 0.20 gallons per square foot of surface area to control the release of dust therefrom when subjected to high winds.
Inventors
- 👤 Joseph W. Callahan
- 👤 Roy M. Christoffel
- 👤 Jack W. Horvath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:01
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A method for reducing the escape of fine aggregate particles from the surface of loose aggregate materials comprising the step of applying to the surface of the aggregate material a uniformly dispersed aqueous solution consists essentially of from about 0.25 to about 2% by weight hydroxyalkylmethylcellulose wherein the alkyl group has from about 1 to about 5 carbon atoms and water.
Claim 2
Independent Claim
61 words
A method for reducing the escape of fine aggregate particles from the surface of loose aggregate materials comprising the step of applying to the surface of the aggregate material a uniformly dispersed aqueous solution consists essentially of from about 0.25 to about 2% by weight hydroxyalkylmethylcellulose wherein the alkyl group has from about 1 to about 5 carbon atoms and water.
Claim 3
Dependent Claim
26 words
The method of claim 1, wherein the aqueous solution also contains a wetting agent in an amount of from about 0.10 to about 0.5% by weight.
Claim 4
Dependent Claim
35 words
The method of claim 2, wherein the aqueous solution is applied to the surface of the aggregate material at the rate of from about 0.05 to about 0.20 gallon per square foot of surface area.
Claim 5
Dependent Claim
10 words
The method of claim 3, wherein the hydroxyalkylmethylcellulose is hydroxypropylmethylcellulose.
Claim 6
Dependent Claim
50 words
The method of claim 3, wherein the wetting agent is an ethylene oxide condensate of nonylphenol, ethylene oxide condensate of octylphenol, ethylene oxide condensate of a straight chain alcohol, a fatty acid amide, a quarternary ammonium compound, an alkali metal or amine neutralized dodecylbenzene sulfonate or a modified coconut diethanolamide.
Claim 7
Dependent Claim
40 words
The method of claim 2, wherein the hydroxylalkylmethylcellulose is a hydroxypropylmethylcellulose having a viscosity of from about 2,000 to about 5,000 cps. when measured as a 2% aqueous solution at 20° C. and wetting agent is a modified coconut diethanolamide.
References Cited (Backward Citations)
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Cited
DE2703505A1
Cited
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GB1534641A
Cited
US4269723A
Cited
DE2914960B1
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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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |