US2539643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for decelerating torpedoes
Assignee: Individual
•
Filing: 1946-05-08
•
Granted: 1951-01-30
•
Expires: 1966-05-08
Abstract
No abstract record available.
Inventors
- 👤 William R Smythe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/48; F42B19/00; F42B19/46; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1457; Y10T24/1459
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2343347A
Cited
US1611353A
Cited
US2269900A
Cited
US2356301A
Cited
US2329736A
Cited
US2426537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |