US4551261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust suppression with elastomer-containing foam
Assignee: WR Grace and Co Conn
•
Filing: 1984-05-07
•
Granted: 1985-11-05
•
Expires: 2004-05-07
Abstract
Abstract The generation of dust by coal and other solid particulate materials is suppressed by the application of a foam which comprises water, a foaming agent, and an elastomeric water insoluble polymer.
Inventors
- 👤 Mark W. Salihar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
The method of suppressing dust generation by a solid particulate material comprising applying to the material a dust-suppressing amount of a foam comprising water, a foaming agent and an elastomeric water insoluble polymer, said foam having a weight ration of the foaming agent to the polymer of from about 5:95 to about 95:5.
Claim 2
Independent Claim
53 words
The method of suppressing dust generation by a solid particulate material comprising applying to the material a dust-suppressing amount of a foam comprising water, a foaming agent and an elastomeric water insoluble polymer, said foam having a weight ration of the foaming agent to the polymer of from about 5:95 to about 95:5.
Claim 3
Dependent Claim
14 words
The method of claim 1 in which the polymer is an organic polymer latex.
Claim 4
Dependent Claim
16 words
The method of claim 1 in which the polymer is a copolymer of styrene and butadiene.
Claim 5
Dependent Claim
14 words
The method of claim 1 in which the foaming agent is an anionic surfactant.
Claim 6
Dependent Claim
18 words
The method of claim 1 in which the foaming agent comprises an anionic surfactant and a nonionic surfactant.
Claim 7
Dependent Claim
23 words
The method of claim 5 in which the weight ratio of anionic surfactant to nonionic surfactant is from about 10:1 to about 2:1.
Claim 8
Dependent Claim
21 words
The method of claim 5 in which the foaming agent comprises a sodium alkyl ether sulfate and a coconut oil alkanolamide.
Claim 9
Dependent Claim
23 words
The method of claim 1 in which the weight ratio of the foaming agent to the polymer is from about 1:10 to 10:1.
Claim 10
Dependent Claim
14 words
The method of claim 1 in which the foam is applied to moving coal.
Claim 11
Dependent Claim
20 words
The method of claim 1 in which the foam has an average bubble diameter of less than about 0.015 inch.
Claim 12
Dependent Claim
30 words
The method of claim 1 in which the foam comprises water, an anionic surfactant, a nonionic surfactant, and a styrene-butadiene copolymer latex and the foam is applied to moving coal.
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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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |