US1581554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of eliminating dangerous vibration periods in ships' propeller shafts
Assignee: Fried Krupp Germaniawerft AG
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Filing: 1923-03-13
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Granted: 1926-04-20
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Expires: 1943-03-13
Abstract
No abstract record available.
Inventors
- 👤 Soltau Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:26
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/02; B63H21/00; B63H21/12; B63H21/14; B63H21/30; B63H21/305; F; F16; F16F; F16F15/00; F16F15/10; F16F15/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-04-19 | 1929-10-19 | 1930-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-04-19 | 1933-10-19 | 1934-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-04-19 | 1937-10-19 | 1938-04-20 | $7700.00 | Window Closed / Lapsed |