Patent US3017832A successfully refreshed from Google Patents.
US3017832A
Expired / Lapsed
US
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Echo firing device for a depth charge
Assignee: Individual
•
Filing: 1950-12-13
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Granted: 1962-01-23
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Expires: 1970-12-13
Abstract
No abstract record available.
Inventors
- 👤 Waldron S Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:55
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1938742A
Cited
US2060198A
Cited
US2346093A
Cited
US2433667A
Cited
US2502454A
Cited
US2502938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |