US2530271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submerged flame burner
Assignee: Individual
•
Filing: 1947-06-02
•
Granted: 1950-11-14
•
Expires: 1967-06-02
Abstract
No abstract record available.
Inventors
- 👤 Swindin Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:54
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38; F23D14/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US751972A
Cited
US710130A
Cited
GB190807701A
Cited
US1730440A
Cited
US1769833A
Cited
US1758474A
Cited
GB292736A
Cited
US2375840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |