US2713841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivotally mounted underwater exhaust
Assignee: Individual
•
Filing: 1954-06-14
•
Granted: 1955-07-26
•
Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 Forbes Thomas Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:18
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/12; B; B63; B63G; B63G13/00; B63G13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-25 | 1959-01-24 | 1959-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-25 | 1963-01-24 | 1963-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-25 | 1967-01-24 | 1967-07-26 | $7700.00 | Window Closed / Lapsed |