US2937864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gun assembly used in an open hearth furnace
Assignee: Steel Company of Wales Ltd
•
Filing: 1957-09-13
•
Granted: 1960-05-24
•
Expires: 1977-09-13
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Kesterton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; F; F27; F27B; F27B3/00; F27B3/10; F27B3/22; F27D; F27D3/00; F27D3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1830574A
Cited
US2333654A
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US2446511A
Cited
US2515631A
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US2612366A
Cited
US2546937A
Cited
US2672413A
Cited
US2829960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |