US2479119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller drive unit with automatic depth regulation
Assignee: Individual
•
Filing: 1943-07-30
•
Granted: 1949-08-16
•
Expires: 1963-07-30
Abstract
No abstract record available.
Inventors
- 👤 Harold I Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
B; B63; B63H; B63H5/00; B63H5/07; B63H5/125; B63B; B63B17/00; B63B17/0018; B63H5/08; B63H5/10; B63H2005/1254; B63H2005/1256; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19628
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US800184A
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FR362629A
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US865943A
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US1143617A
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US1204895A
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US1273556A
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US1454180A
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US1514522A
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CH138178A
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US1764918A
Cited
GB409082A
Cited
US2124497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |