Patent US2941518A successfully refreshed from Google Patents.
US2941518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for controlling temperature of furnace gases, tube metal and steam
Assignee: Combustion Engineering Inc
•
Filing: 1957-12-17
•
Granted: 1960-06-21
•
Expires: 1977-12-17
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Firl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:00
CPC Classifications
F; F23; F23C; F23C5/00; F23C5/08; F23C5/32; F22; F22B; F22B21/00; F22B21/34; F22B21/341; F22G; F22G5/00; F22G5/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |