Patent US3167535A successfully refreshed from Google Patents.
US2747884A
Expired / Lapsed
US
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Leveling attachment for farm implement hitches
Assignee: Individual
•
Filing: 1954-12-02
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Granted: 1956-05-29
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Expires: 1974-12-02
Abstract
No abstract record available.
Inventors
- 👤 Vilder Arthur De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:58
CPC Classifications
A; A01; A01D; A01D67/00; A01D67/005; A01D75/00; A01D75/28
Claims Analysis
Total Claims: 0
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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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |