Patent US2902258A successfully refreshed from Google Patents.
US2902258A
Expired / Lapsed
US
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Vibrating bit assembly
Assignee: Jersey Production Research Co
•
Filing: 1956-03-30
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Granted: 1959-09-01
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Expires: 1976-03-30
Abstract
No abstract record available.
Inventors
- 👤 Alexander B Hildebraudt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:20
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1965564A
Cited
US2727729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |