US2731254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annealing furnace structure
Assignee: Bethlehem Steel Corp
•
Filing: 1951-10-11
•
Granted: 1956-01-17
•
Expires: 1971-10-11
Abstract
No abstract record available.
Inventors
- 👤 George J Campbell
- 👤 Lewis G Coscia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:34
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2558088A
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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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |