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US3446293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile driver
Assignee: AMERICAN DRILLING AND BORING CO Inc
•
Filing: 1966-12-28
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Granted: 1969-05-27
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Expires: 1986-12-28
Abstract
No abstract record available.
Inventors
- 👤 Charles L Guild
- 👤 Willard B Goodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:17
CPC Classifications
E; E02; E02D; E02D13/00; E02D13/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2723532A
Cited
US911971A
Cited
US845953A
Cited
US886193A
Cited
US2184745A
Cited
US2948122A
Cited
US3162252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |