US2694741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated annealing furnace base
Assignee: Armco Inc
•
Filing: 1953-06-17
•
Granted: 1954-11-16
•
Expires: 1973-06-17
Abstract
No abstract record available.
Inventors
- 👤 Edgar E Rice
- 👤 Matthew J Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:55
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/62; H05B3/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1682402A
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US2139201A
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US2255518A
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US2490412A
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US2547795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |