US2841206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weighted spring tractor seat
Assignee: Individual
•
Filing: 1957-05-10
•
Granted: 1958-07-01
•
Expires: 1977-05-10
Abstract
No abstract record available.
Inventors
- 👤 Delphenus K O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:31
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/50; B60N2/502; B60N2/506; B60N2/52; B60N2/522; B60N2/54; B60N2/544
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |