US2071428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic gear shift
Assignee: Individual
•
Filing: 1935-05-18
•
Granted: 1937-02-23
•
Expires: 1955-05-18
Abstract
No abstract record available.
Inventors
- 👤 David C Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:07
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0293; F16H37/00; F16H37/02; F16H37/04; F16H37/042; F16H37/046; F16H61/0262; F16H61/0265; F16H61/0267; F16H61/0269
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) | 1940-02-23 | 1940-08-24 | 1941-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-23 | 1944-08-24 | 1945-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-23 | 1948-08-24 | 1949-02-23 | $7700.00 | Window Closed / Lapsed |