US2480230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas igniter for blast furnace bleeder stacks and the like
Assignee: National Tube Co
•
Filing: 1944-10-06
•
Granted: 1949-08-30
•
Expires: 1964-10-06
Abstract
No abstract record available.
Inventors
- 👤 Elster Bert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:22
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; F23G7/08; F23G7/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US765534A
Cited
US1535240A
Cited
US1665088A
Cited
US1775565A
Cited
US2282551A
Cited
US2303868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |