US2821378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapping device for molten metals
Assignee: Ajax Engineering Corp
•
Filing: 1955-02-28
•
Granted: 1958-01-28
•
Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Tama Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:12
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/15; F27D3/1509; F27B; F27B14/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1027821A
Cited
US1162246A
Cited
US2112161A
Cited
US2426644A
Cited
US2535335A
Cited
GB702833A
Cited
US2587727A
Cited
US2676011A
Cited
US2678480A
Cited
US2713705A
Cited
US2745153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |