US4194023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled deposition of asphalt emulsions
Assignee: Mobil Oil AS
•
Filing: 1978-09-22
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Granted: 1980-03-18
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Expires: 1998-09-22
Abstract
Abstract There is provided a method for depositing asphalt from an asphalt emulsion onto an aggregate, as in road construction. Prior to applying the asphalt emulsion, the aggregate is wetted down with water containing a minor amount of an anionic or a cationic coupling agent selected to have a charge opposite to that of the asphalt emulsion.
Inventors
- 👤 Donald R. Cushman
- 👤 Charles A. Pagen
- 👤 John W. Schick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:54
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1018; C04B20/1029; C04B20/1044; E; E01; E01C; E01C7/00; E01C7/08; E01C7/35; E01C7/353
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
A method for depositing asphalt from an asphalt emulsion onto an aggregate, that comprises wetting down the aggregate with water containing between about 0.01 weight percent and about 1.0 weight percent of coupling agent selected to have charge opposite to the charge of said asphalt emulsion and applying said asphalt emulsion to the wetted aggregate.
Claim 2
Independent Claim
55 words
A method for depositing asphalt from an asphalt emulsion onto an aggregate, that comprises wetting down the aggregate with water containing between about 0.01 weight percent and about 1.0 weight percent of coupling agent selected to have charge opposite to the charge of said asphalt emulsion and applying said asphalt emulsion to the wetted aggregate.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein said aggregate is sand, said coupling agent is cationic, and said asphalt emulsion is anionic.
Claim 4
Dependent Claim
19 words
The method of claim 2, wherein said coupling agent is the salt of a reduced polyacrylamide and acetic acid.
Claim 5
Dependent Claim
21 words
The method of claim 1, wherein said aggregate is sand, said coupling agent is anionic, and said asphalt emulsion is cationic.
Claim 6
Dependent Claim
18 words
The method of claim 4, wherein said coupling agent is a potassium salt of 16 percent hydrolyzed polyacrylamide.
Claim 7
Dependent Claim
21 words
The method of claim 1, wherein said aggregate is limestone, said coupling agent is anionic, and said asphalt emulsion is cationic.
Claim 8
Dependent Claim
18 words
The method of claim 6, wherein said coupling agent is a potassium salt of 16 percent hydrolyzed polyacrylamide.
Claim 9
Dependent Claim
21 words
The method of claim 1, wherein said aggregate is gravel, said coupling agent is cationic, and said asphalt emulsion is anionic.
Claim 10
Dependent Claim
19 words
The method of claim 8, wherein said coupling agent is the salt of a reduced polyacrylamide and acetic acid.
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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) | 1983-03-18 | 1983-09-17 | 1984-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-18 | 1987-09-17 | 1988-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-18 | 1991-09-17 | 1992-03-18 | $7700.00 | Window Closed / Lapsed |