US2894457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detonation delay device
Assignee: Philips North America LLC
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Filing: 1955-03-18
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Granted: 1959-07-14
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Expires: 1975-03-18
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Severance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:05
CPC Classifications
F; F23; F23Q; F23Q2/00; F23Q2/28; F23Q2/285; F23Q2/287; F23Q3/00; F23Q3/002; F42; F42C; F42C11/00; F42C11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH277052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |