Patent US3559207A successfully refreshed from Google Patents.
US3132701A
Expired / Lapsed
US
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Horizontal earth boring machine
Assignee: Individual
•
Filing: 1961-07-28
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Granted: 1964-05-12
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Expires: 1981-07-28
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Juntunen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:53
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/20; E21B7/201; E21B19/00; E21B19/08; E21B7/04; E21B7/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |