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US2387014A
Expired / Lapsed
US
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Rotary kiln
Assignee: COWHAM ENGINEERING Co
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Filing: 1943-05-15
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Granted: 1945-10-16
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Expires: 1963-05-15
Abstract
No abstract record available.
Inventors
- 👤 Estell L Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:56
CPC Classifications
F; F27; F27B; F27B7/00; C; C21; C21C; C21C7/00; F27B3/00; F27B3/10; F27B3/20; F27B7/20; F27B7/32
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) | 1948-10-15 | 1949-04-16 | 1949-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-10-15 | 1953-04-16 | 1953-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-10-15 | 1957-04-16 | 1957-10-16 | $7700.00 | Window Closed / Lapsed |