US2922237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for converting a conventional four-wheel tractor into a twowheel tractor and two-wheel implement combination
Assignee: Oliver Corp Japan
•
Filing: 1956-08-02
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Granted: 1960-01-26
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Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Harrison Benjamin
- 👤 Jolly K Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:02
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/65; E02F3/651; B; B62; B62D; B62D12/00; B62D53/00; B62D53/02; E02F3/6454; E02F3/653
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2189072A
Cited
US2368202A
Cited
US2583197A
Cited
US2614644A
Cited
US2650440A
Cited
US2773320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |