US2451433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon extraction apparatus
Assignee: Lummus Technology LLC
•
Filing: 1946-07-24
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Granted: 1948-10-12
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Expires: 1966-07-24
Abstract
No abstract record available.
Inventors
- 👤 Hyman R Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:05
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; C; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2135009A
Cited
US2116428A
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US2149574A
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US2239470A
Cited
US2213798A
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US2367671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |