US2599840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stoker fuel supply signal switch
Assignee: Individual
•
Filing: 1949-04-02
•
Granted: 1952-06-10
•
Expires: 1969-04-02
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Keele
- 👤 Merle L Noble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:45
CPC Classifications
F; F23; F23K; F23K3/00; F23K3/10; F23K3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1911530A
Cited
US1892084A
Cited
US1892790A
Cited
US1891319A
Cited
US2441480A
Cited
US2442275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |