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US2435746A
Expired / Lapsed
US
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Stage eduction of oil shale
Assignee: Union Oil Company of California
•
Filing: 1943-11-13
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Granted: 1948-02-10
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Expires: 1963-11-13
Abstract
No abstract record available.
Inventors
- 👤 Philip H Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:50
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02; Y; Y10; Y10S; Y10S208/00; Y10S208/952
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1375714A
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USRE16326E
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US1297022A
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US1824282A
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US1674420A
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US1814463A
Cited
GB286404A
Cited
US1943291A
Cited
GB388853A
Cited
US2140276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-09 | 1951-08-11 | 1952-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-09 | 1955-08-11 | 1956-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-09 | 1959-08-11 | 1960-02-10 | $7700.00 | Window Closed / Lapsed |