US2434491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of firing metallurgical furnaces
Assignee: Individual
•
Filing: 1942-10-06
•
Granted: 1948-01-13
•
Expires: 1962-10-06
Abstract
No abstract record available.
Inventors
- 👤 Harold G Elder
- 👤 John F Mowat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:21
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2052187A
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US2252323A
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US2276971A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |