US2737890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety unit for explosive devices
Assignee: Individual
•
Filing: 1942-11-09
•
Granted: 1956-03-13
•
Expires: 1962-11-09
Abstract
No abstract record available.
Inventors
- 👤 Robert B Brode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/34; F42C15/28; F42C15/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US379716A
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US682728A
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US1296281A
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FR539534A
Cited
US1523073A
Cited
US1652635A
Cited
US1863837A
Cited
FR694402A
Cited
US1863838A
Cited
US2110552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |