US2431677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of oil from shales
Assignee: Individual
•
Filing: 1945-06-08
•
Granted: 1947-12-02
•
Expires: 1965-06-08
Abstract
No abstract record available.
Inventors
- 👤 Harry D Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:15
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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US1327572A
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US1778515A
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US1627163A
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US1458983A
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US1475028A
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US1529505A
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US1694361A
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US1864496A
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US2132441A
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US2308247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |