Patent US3239337A successfully refreshed from Google Patents.
Patent US2579652A successfully refreshed from Google Patents.
US2579652A
Expired / Lapsed
US
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Pumpable powdered asphalt suspension
Assignee: Asphalt Specialties Co
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Filing: 1948-01-12
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Granted: 1951-12-25
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Expires: 1968-01-12
Abstract
No abstract record available.
Inventors
- 👤 Harold F Dague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:38
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A READILY PUMBABLE POWDERED ASPHALT SUSPENSION OF THE CHARACTER DESCRIBED, CONTAINING BETWEEN ABOUT 50% AND 65% BY WEIGHT OF POWDERED ASPHALT, BETWEEN 50% AND 35% OF WATER, AND FROM ABOUT 0.5% AND 3% OF AN OIL SOLUBLE, ANIONIC SURFACE-ACTIVE SULFONATE.
Claim 2
Dependent Claim
40 words
A READILY PUMBABLE POWDERED ASPHALT SUSPENSION OF THE CHARACTER DESCRIBED, CONTAINING BETWEEN ABOUT 50% AND 65% BY WEIGHT OF POWDERED ASPHALT, BETWEEN 50% AND 35% OF WATER, AND FROM ABOUT 0.5% AND 3% OF AN OIL SOLUBLE, ANIONIC SURFACE-ACTIVE SULFONATE.
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Cited
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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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |