US2489498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stoker safety control device
Assignee: Individual
•
Filing: 1947-08-12
•
Granted: 1949-11-29
•
Expires: 1967-08-12
Abstract
No abstract record available.
Inventors
- 👤 Palmer John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:35
CPC Classifications
B; B65; B65G; B65G43/00; B65G43/08; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1892790A
Cited
US1891319A
Cited
US2015939A
Cited
US2266906A
Cited
US2249372A
Cited
US2430407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |