US2834158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic drill
Assignee: Gulton Industries Inc
•
Filing: 1955-01-28
•
Granted: 1958-05-13
•
Expires: 1975-01-28
Abstract
No abstract record available.
Inventors
- 👤 Lucien A Petermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:23
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736144A
Cited
US1796650A
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US1882399A
Cited
DE671141C
Cited
US2460919A
Cited
US2504831A
Cited
US2702691A
Cited
US2580716A
Cited
US2616223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |