US2540966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace control system
Assignee: —
•
Filing: —
•
Granted: 1951-02-06
•
Expires: 1968-02-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:16
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/27; F; F27; F27D; F27D19/00; G05D23/1906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2025542A
Cited
US2324525A
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US1978701A
Cited
US2037082A
Cited
US1962676A
Cited
US1989829A
Cited
US2205182A
Cited
US2273126A
Cited
US2303110A
Cited
US2337410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |