US3108645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill for tractors
Assignee: Individual
•
Filing: 1961-04-12
•
Granted: 1963-10-29
•
Expires: 1981-04-12
Abstract
No abstract record available.
Inventors
- 👤 Martin C Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:21
CPC Classifications
A; A01; A01C; A01C5/00; A01C5/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
IN A DRILL, ROTATABLE DRIVE SHAFTS, MEANS FOR SUPPORTING SAID DRIVE SHAFTS, BITS MOUNTED ON THE LOWER END OF SAID DRIVE SHAFTS, SAID BITS HAVING A CENTER BLADE, THE SIDE MARGINS OF SAID CENTER BLADE TAPERING TO A POINT, SIDE BLADES INTEGRAL WITH AND EXTENDING LATERALLY FROM SAID CENTER BLADE, THE SIDE MARGIN OF EACH SIDE BLADE EXTENDING FROM AN OPPOSITE UPPER END CORNER OF SAID CENTER BLADE TO SAID POINT AND THE LOWER END FACE OF SAID SIDE BLADES BEING BEVELED TO PROVIDE A SHARP CUTTING EDGE.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |