Patent US3156303A successfully refreshed from Google Patents.
US3156303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor draft control spring
Assignee: Ford Motor Co
•
Filing: 1961-12-22
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Granted: 1964-11-10
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Peter F Hilder
- 👤 William S Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:42
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/111; A01B63/112
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2402400A
Cited
US2620239A
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US2804814A
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US3039758A
Cited
FR1133819A
Cited
US2900030A
Cited
DE1024740B
Cited
FR1206153A
Cited
GB872964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |