Patent US2622669A successfully refreshed from Google Patents.
US2622669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control and indicating means for burner igniter torches
Assignee: Combustion Engineering Inc
•
Filing: 1950-11-03
•
Granted: 1952-12-23
•
Expires: 1970-11-03
Abstract
No abstract record available.
Inventors
- 👤 Virginius Z Caracristi
- 👤 Harvey C Mittendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:35
CPC Classifications
F; F23; F23C; F23C99/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1920115A
Cited
DE354457C
Cited
US2127445A
Cited
US2168859A
Cited
US2225700A
Cited
US2259299A
Cited
US2297821A
Cited
US2335471A
Cited
US2406185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |