US3306372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post hole drilling machine
Assignee: Individual
•
Filing: 1964-01-29
•
Granted: 1967-02-28
•
Expires: 1984-01-29
Abstract
No abstract record available.
Inventors
- 👤 Valton G Struve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; F; F16; F16H; F16H7/00; F16H7/08; F16H2007/0889; F16H2007/0893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE498679A
Cited
US1318733A
Cited
US2565224A
Cited
US2533957A
Cited
US2774568A
Cited
US3246705A
Cited
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 |