US2499076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling fuel and air supply to boilers responsive to boiler demand
Assignee: Republic Flow Meters Co
•
Filing: 1945-04-28
•
Granted: 1950-02-28
•
Expires: 1965-04-28
Abstract
No abstract record available.
Inventors
- 👤 Albert J Rosenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:42
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1655683A
Cited
US886261A
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US894784A
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US991641A
Cited
US1052796A
Cited
US1360285A
Cited
US1813921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |