US2650668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsion spring mounting of tractor drive wheels
Assignee: Individual
•
Filing: 1949-06-09
•
Granted: 1953-09-01
•
Expires: 1969-06-09
Abstract
No abstract record available.
Inventors
- 👤 Richard B Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:23
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/22; B60G11/225; B60G17/00; B60G17/02; B60G17/023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1692881A
Cited
US1943721A
Cited
US2049474A
Cited
US2043542A
Cited
US2199684A
Cited
US2286609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |