US2489700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of values from rock asphalt and like material
Assignee: CLARENCE H DRAGERT
•
Filing: 1946-07-20
•
Granted: 1949-11-29
•
Expires: 1966-07-20
Abstract
No abstract record available.
Inventors
- 👤 John W Coast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:20
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1357278A
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US1490213A
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US1778515A
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US1607977A
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US1868737A
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US1903749A
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US1934028A
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US2328325A
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US2431677A
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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) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |