Patent US2127216A successfully refreshed from Google Patents.
Patent US1576754A successfully refreshed from Google Patents.
US1576754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace control
Assignee: ENGINEER CO
•
Filing: 1921-12-10
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Granted: 1926-03-16
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Expires: 1941-12-10
Abstract
No abstract record available.
Inventors
- 👤 Mclean Embury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:34
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-03-15 | 1929-09-14 | 1930-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-03-15 | 1933-09-14 | 1934-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-03-15 | 1937-09-14 | 1938-03-16 | $7700.00 | Window Closed / Lapsed |