US2464271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal liquefaction by hydrogenation
Assignee: Individual
•
Filing: 1943-12-24
•
Granted: 1949-03-15
•
Expires: 1963-12-24
Abstract
No abstract record available.
Inventors
- 👤 Henry H Storch
- 👤 Lester L Hirst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:49
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/08; C10G1/083; C10G1/006; C10G1/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1915394A
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US1863670A
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US2098400A
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US2106735A
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US2073578A
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US2088214A
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US2132613A
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US2356611A
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US2291300A
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US2319991A
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US2349721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |