US2921520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detonator plug
Assignee: Individual
•
Filing: 1953-06-18
•
Granted: 1960-01-19
•
Expires: 1973-06-18
Abstract
No abstract record available.
Inventors
- 👤 Donald M Stonestrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:14
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US138679A
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US307071A
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US319628A
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US2069951A
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US2071432A
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US2290008A
Cited
US2350556A
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US2508469A
Cited
US2592754A
Cited
US2708877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |