US3382932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic impact drilling apparatus
Assignee: Hydroacoustics Inc
•
Filing: 1965-05-24
•
Granted: 1968-05-14
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Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Boyd A Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:42
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/12; B25D9/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195478A
Cited
US2742265A
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US3006446A
Cited
US2815928A
Cited
US3139146A
Cited
US2942849A
Cited
US3060894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |