US2593481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Port chamber wall construction with deposit retaining ledge for open hearth furnaces
Assignee: MH Detrick Co
•
Filing: 1947-09-27
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Granted: 1952-04-22
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Expires: 1967-09-27
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Over
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:55
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/10; F27B3/12; F27B3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US289952A
Cited
US350981A
Cited
US446971A
Cited
US605797A
Cited
US1068470A
Cited
US1747823A
Cited
GB505790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |