Patent US1806597A successfully refreshed from Google Patents.
Patent US2441897A successfully refreshed from Google Patents.
US2441897A
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Method of and apparatus for exploding armor piercing projectiles
Assignee: United States Department of the Navy
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Filing: 1932-10-25
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Granted: 1948-05-18
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Expires: 1952-10-25
Abstract
No abstract record available.
Inventors
- 👤 Harry J Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:28
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/24; F42C15/26; F42B; F42B12/00; F42B12/02; F42B12/36; F42B12/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US475786A
Cited
US1310046A
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US999470A
Cited
GB191105284A
Cited
GB207021A
Cited
US1545139A
Cited
GB221821A
Cited
US1865802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |