Patent US2759407A successfully refreshed from Google Patents.
US2759407A
Expired / Lapsed
US
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Tractor guides
Assignee: Individual
•
Filing: 1952-02-25
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Granted: 1956-08-21
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Expires: 1972-02-25
Abstract
No abstract record available.
Inventors
- 👤 Harry P Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:43
CPC Classifications
A; A01; A01B; A01B69/00; A01B69/007; A01B69/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US986615A
Cited
US1031065A
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US1343062A
Cited
US1567853A
Cited
US1977273A
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US2107535A
Cited
US2555793A
Cited
US2465660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |