Patent US2867172A successfully refreshed from Google Patents.
US2867172A
Expired / Lapsed
US
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Detonation of unprimed base charges
Assignee: Individual
•
Filing: 1954-07-19
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Granted: 1959-01-06
•
Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Hradel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:27
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08; F42D1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2171416A
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US2316596A
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US2420201A
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US2463709A
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US2494256A
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US2504611A
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US2708876A
Cited
GB701074A
Cited
US2703528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |