Patent US3306368A successfully refreshed from Google Patents.
US3306368A
Expired / Lapsed
US
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Ground leveling device
Assignee: Individual
•
Filing: 1964-09-16
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Granted: 1967-02-28
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Expires: 1984-09-16
Abstract
No abstract record available.
Inventors
- 👤 Rosenvold Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:20
CPC Classifications
A; A01; A01B; A01B61/00; A01B61/04; A01B61/044; A01B61/046; A01B37/00; E; E02; E02F; E02F5/00; E02F5/02; E02F5/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A GROUND LEVELING DEVICE ADAPTED TO BE ATTACHED TO THE FORWARD END OF A TRACTOR COMPRISING A FRAME, SAID FRAME HAVING ITS REARWARD END PIVOTALLY MOUNTED TO SAID TRACTOR, SAID FRAME HAVING TELESCOPING MEANS TO MOVE SAID FRAME FORWARDLY RELATIVE TO SAID TRACTOR TO ADJUST SAID FRAME TO DIFFERENT SIZE TRACTORS, A PAIR OF ARMS PIVOTALLY ATTACHED TO THE FORWARD END OF SAID FRAME, SWEEPS ATTACHED TO SAID ARMS TO LEVEL A PATH IN FRONT OF THE TIRES OF A TRACTOR, BIASING MEANS URGING SAID SWEEPS DOWNWARD RELATIVE TO SAID FRAME, CABLE MEANS TO RAISE SAID FRAME AND SWEEPS OFF THE GROUND WHEN TURNING THE TRACTOR TO EITHER THE LEFT OR RIGHT, SAID FRAME AND SWEEPS BEING ADAPTED TO BE RAISED BY SAID CABLE FREE OF SAID BIASING MEANS, SAID SWEEP HAVING U-SHAPED ROD MEANS MOUNTED TO SAID SWEEPS WITH THE U-PORTION OF THE U-SHAPED ROD MEANS PROJECTING FORWARD AND SLIGHTLY UPWARD, SAID U-SHAPED ROD MEANS LIMITING THE DOWNWARD MOVEMENT OF THE SWEEPS WHEN LEVELING THE GROUND.
Claim 2
Dependent Claim
167 words
A GROUND LEVELING DEVICE ADAPTED TO BE ATTACHED TO THE FORWARD END OF A TRACTOR COMPRISING A FRAME, SAID FRAME HAVING ITS REARWARD END PIVOTALLY MOUNTED TO SAID TRACTOR, SAID FRAME HAVING TELESCOPING MEANS TO MOVE SAID FRAME FORWARDLY RELATIVE TO SAID TRACTOR TO ADJUST SAID FRAME TO DIFFERENT SIZE TRACTORS, A PAIR OF ARMS PIVOTALLY ATTACHED TO THE FORWARD END OF SAID FRAME, SWEEPS ATTACHED TO SAID ARMS TO LEVEL A PATH IN FRONT OF THE TIRES OF A TRACTOR, BIASING MEANS URGING SAID SWEEPS DOWNWARD RELATIVE TO SAID FRAME, CABLE MEANS TO RAISE SAID FRAME AND SWEEPS OFF THE GROUND WHEN TURNING THE TRACTOR TO EITHER THE LEFT OR RIGHT, SAID FRAME AND SWEEPS BEING ADAPTED TO BE RAISED BY SAID CABLE FREE OF SAID BIASING MEANS, SAID SWEEP HAVING U-SHAPED ROD MEANS MOUNTED TO SAID SWEEPS WITH THE U-PORTION OF THE U-SHAPED ROD MEANS PROJECTING FORWARD AND SLIGHTLY UPWARD, SAID U-SHAPED ROD MEANS LIMITING THE DOWNWARD MOVEMENT OF THE SWEEPS WHEN LEVELING THE GROUND.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |