US2057622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical stoker
Assignee: Babcock and Wilcox Co
•
Filing: 1933-06-06
•
Granted: 1936-10-13
•
Expires: 1953-06-06
Abstract
No abstract record available.
Inventors
- 👤 Webster Hosea
- 👤 Lewis W Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:06
CPC Classifications
F; F23; F23B; F23B10/00; F23B1/00; F23B1/16; F23B1/22; F23B30/00; F23B30/02; F23B30/06; F23B30/08; F23B50/00; F23B50/02; F23B50/10
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) | 1939-10-13 | 1940-04-13 | 1940-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-10-13 | 1944-04-13 | 1944-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-10-13 | 1948-04-13 | 1948-10-13 | $7700.00 | Window Closed / Lapsed |