US2434815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for educting oil from oil shale by use of superheated steam
Assignee: Union Oil Company of California
•
Filing: 1943-10-30
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Granted: 1948-01-20
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Expires: 1963-10-30
Abstract
No abstract record available.
Inventors
- 👤 Richard J Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:23
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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-19 | 1951-07-21 | 1952-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-19 | 1955-07-21 | 1956-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-19 | 1959-07-21 | 1960-01-20 | $7700.00 | Window Closed / Lapsed |