US2519475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control of hot-blast temperatures
Assignee: National Tube Co
•
Filing: 1944-10-21
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Granted: 1950-08-22
•
Expires: 1964-10-21
Abstract
No abstract record available.
Inventors
- 👤 Truman H Kennedy
- 👤 Emmons T Mortson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/138; C; C21; C21B; C21B9/00; C21B9/10; C21B9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20083E
Cited
US1167740A
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US1458288A
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US1435119A
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US2094738A
Cited
US2171803A
Cited
US2080950A
Cited
US2300537A
Cited
US2458947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |