US2479638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonequalizing torque differential transmission
Assignee: DUALOC ENGINEERING Co
•
Filing: 1946-01-23
•
Granted: 1949-08-23
•
Expires: 1966-01-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:33
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/28; F16H48/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1397066A
Cited
US1361895A
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US1355152A
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US1413982A
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US1431535A
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GB308451A
Cited
US1938649A
Cited
US1938457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-22 | 1953-02-21 | 1953-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-22 | 1957-02-21 | 1957-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-22 | 1961-02-21 | 1961-08-23 | $7700.00 | Window Closed / Lapsed |