US2464810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion
Assignee: Foster Wheeler Inc
•
Filing: 1944-08-25
•
Granted: 1949-03-22
•
Expires: 1964-08-25
Abstract
No abstract record available.
Inventors
- 👤 Joel H Hirsch
- 👤 Kenneth E Cody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:43
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2360349A
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US2341193A
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US2379711A
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US2337640A
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US2327175A
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US2356697A
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US2402893A
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US2353731A
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US2385325A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |