Patent USRE27530E successfully refreshed from Google Patents.
USRE27530E
Expired / Lapsed
US
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Land leveling implement
Assignee: —
•
Filing: 1971-05-17
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Granted: 1972-12-12
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Expires: 1991-05-17
Abstract
Abstract A LAND LEVELING IMPLEMENT ADAPTED TO BE TRAILINGLY DRAWN BY A TRACTOR. THE IMPLEMENT INCLUDES A LONG FRAME, SLIDE TYPE RUNNER MEMBERS ON THE FORWARD AND REARWARD ENDS OF THE FRAME, AN EARTH WORKING MEMBER MOUNTED AT THE MIDDLE OF THE FRAME, AND TRIP MEANS OR UNLOADER MEANS INCLUDING LAND RUNNING WHEELS FOR RAISING THE EARTH WORKING MEMBER WHEN THE TRACTIVE EFFORT OR DRAFT FORCE ON THE IMPLEMENT REACHES A CERTAIN POINT.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:36
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7663; E02F3/7672
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |