US2921525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal time delay unshorter for protection of detonating squib
Assignee: Individual
•
Filing: 1947-10-31
•
Granted: 1960-01-19
•
Expires: 1967-10-31
Abstract
No abstract record available.
Inventors
- 👤 Norman H Ricker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:46
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB241941A
Cited
US1792299A
Cited
US2103014A
Cited
US2202719A
Cited
US2368310A
Cited
US2393860A
Cited
US2395782A
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 |