Patent US2277458A successfully refreshed from Google Patents.
US2277458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential driving mechanism
Assignee: JOHN C DORAN
•
Filing: 1939-05-27
•
Granted: 1942-03-24
•
Expires: 1959-05-27
Abstract
No abstract record available.
Inventors
- 👤 Schultze Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:46
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q2705/00; B23Q2705/005; F; F16; F16H; F16H7/00; F16H7/08; F16H2007/0863; F16H2007/0874
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1945-03-23 | 1945-09-22 | 1946-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-23 | 1949-09-22 | 1950-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-23 | 1953-09-22 | 1954-03-24 | $7700.00 | Window Closed / Lapsed |