Patent US2475281A successfully refreshed from Google Patents.
US2475281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay electric initiator
Assignee: Hercules Powder Co
•
Filing: 1945-01-19
•
Granted: 1949-07-05
•
Expires: 1965-01-19
Abstract
No abstract record available.
Inventors
- 👤 Edward J Hanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:24
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/16; F42B3/12; F42B3/128
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE149890C
Cited
DE305140C
Cited
US838216A
Cited
US938553A
Cited
US1436248A
Cited
US2007959A
Cited
US1964826A
Cited
US1989729A
Cited
US2123691A
Cited
US2228339A
Cited
US2370159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-04 | 1953-01-03 | 1953-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-04 | 1957-01-03 | 1957-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-04 | 1961-01-03 | 1961-07-05 | $7700.00 | Window Closed / Lapsed |