Patent US2252807A successfully refreshed from Google Patents.
US2252807A
Expired / Lapsed
US
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Coke oven charging mechanism
Assignee: Beazer East Inc
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Filing: 1939-05-19
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Granted: 1941-08-19
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Expires: 1959-05-19
Abstract
No abstract record available.
Inventors
- 👤 Haberle Albert
- 👤 Koppitz Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
C; C10; C10B; C10B41/00; C10B41/02; C10B41/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-08-18 | 1945-02-17 | 1945-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-18 | 1949-02-17 | 1949-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-18 | 1953-02-17 | 1953-08-19 | $7700.00 | Window Closed / Lapsed |