US3587755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth boring apparatus
Assignee: Individual
•
Filing: 1969-08-11
•
Granted: 1971-06-28
•
Expires: 1989-08-11
Abstract
Abstract NECTED TO THE POWER OPERATED POSITIONING MEANS AND TO THE DRIVE MEANS FOR REGULATING THE TRAVEL SPEED OF THE PLATFORM ALONG THE FRAME AND FOR REGULATING THE ROTARY SPEED OF THE AUGER DRIVE SHAFT. AN EARTH BORING APPARATUS FOR BORING HOLES UNDER ROADWAYS AND THE LIKE AND INCLUDING A PLATFORM WHICH IS MOVABLE ALONG AN ELONGATED FRAME IN RESPONSE TO POWER OPERATED POSITIONING MEANS. AN AUGER DRIVE SHAFT IS ROTATABLY MOUNTED ON THE PLATFORM AND OPERATIVELY CONNECTED TO DRIVE MEANS FOR ROTATING THE AUGER DRIVE SHAFT. CONTROL MEANS ARE OPERTIVELY CON-
Inventors
- 👤 Emmet G Slusher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:38
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/003; E21B7/005; E21B44/00; E21B44/02
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |