US2678434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically operated boiler alarm control device
Assignee: Reliance Gauge Column Co
•
Filing: 1949-09-22
•
Granted: 1954-05-11
•
Expires: 1969-09-22
Abstract
No abstract record available.
Inventors
- 👤 Brown John Rowland
- 👤 Gilbert Roy Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:01
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/42; F22B37/426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1710499A
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US1463986A
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US1774433A
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US2261495A
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US2385161A
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US2388812A
Cited
US2394220A
Cited
US2468791A
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US2503654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |