Patent US1840431A successfully refreshed from Google Patents.
US1840431A
Expired / Lapsed
US
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Charge for high explosive shells
Assignee: Hercules Powder Co
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Filing: 1928-01-19
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Granted: 1932-01-12
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Expires: 1948-01-19
Abstract
No abstract record available.
Inventors
- 👤 Newton C Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:01
CPC Classifications
C; C06; C06B; C06B31/00; C06B31/28; C06B31/32; C06B31/38; C06B31/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-01-11 | 1935-07-13 | 1936-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-11 | 1939-07-13 | 1940-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-11 | 1943-07-13 | 1944-01-12 | $7700.00 | Window Closed / Lapsed |