US1737170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeding device for retorts
Assignee: SAMUEL E DARBY
•
Filing: 1926-12-14
•
Granted: 1929-11-26
•
Expires: 1946-12-14
Abstract
No abstract record available.
Inventors
- 👤 Richard B Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:52
CPC Classifications
C; C10; C10B; C10B31/00; C10B31/02
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) | 1932-11-25 | 1933-05-27 | 1933-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-25 | 1937-05-27 | 1937-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-25 | 1941-05-27 | 1941-11-26 | $7700.00 | Window Closed / Lapsed |