US3923537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold asphalt binder and paving process
Assignee: Bray Oil Co
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Filing: 1972-04-28
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Granted: 1975-12-02
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Expires: 1992-04-28
Abstract
Abstract Powdered high melt asphalt, e.g. 250*-340* softening point, is suspended in water with a dispersant and the liquid is mixed with aggregate and a flux oil which unites with the asphalt when the mixture is compacted as on a pavement, forming a strong binder for the stone.
Inventors
- 👤 Jack E Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:49
CPC Classifications
C; C08; C08L; C08L95/00; C08L95/005; E; E01; E01C; E01C11/00; E01C11/005; E01C19/00; E01C19/02; E01C19/10; E01C19/1059; E01C19/1068; E01C19/1077
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A STABLE LIQUID COMPOSITION SUITABLE FOR BINDING STONE AGGREGATE COMPRISING (A) A SUSPENSION IN WATER OF POWDERED HARD ASPHALT, SOFTENING POINT ABOVE ABOUT 250*F., HAVING A PARTICLE SIZE LYING PREDOMINANTLY IN THE RANGE OF 10 TO 200 MESH STABILIZED WITH A WATER SOLUBLE DISPERSANT AND (B) A FLUX OIL OF THE CHARACTER USED IN PAVING MIXTURES, THE RATIO OF ASPHALT TO FLUX OIL IN THE COMPOSITION BEING ABOUT 1:4 TO 1:10.
Claim 2
Dependent Claim
71 words
A STABLE LIQUID COMPOSITION SUITABLE FOR BINDING STONE AGGREGATE COMPRISING (A) A SUSPENSION IN WATER OF POWDERED HARD ASPHALT, SOFTENING POINT ABOVE ABOUT 250*F., HAVING A PARTICLE SIZE LYING PREDOMINANTLY IN THE RANGE OF 10 TO 200 MESH STABILIZED WITH A WATER SOLUBLE DISPERSANT AND (B) A FLUX OIL OF THE CHARACTER USED IN PAVING MIXTURES, THE RATIO OF ASPHALT TO FLUX OIL IN THE COMPOSITION BEING ABOUT 1:4 TO 1:10.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein the flux oil is emulsified in water as an oil-in-water emulsion before mixing with said asphalt suspension.
Claim 4
Dependent Claim
48 words
The composition of claim 2 wherein the said suspension of hard asphalt of softening point above about 250*F. is made by atomizing a melt thereof into a suspending zone wherein particles of said melt are congealed and suspended in a spray of water containing said water soluble dispersant.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |