US2597461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead base alloy
Assignee: American Metal Co Ltd
•
Filing: 1947-08-19
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Granted: 1952-05-20
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Expires: 1967-08-19
Abstract
No abstract record available.
Inventors
- 👤 James F Ednie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:42
CPC Classifications
C; C22; C22C; C22C11/00; C22C11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1502391A
Cited
GB309399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |