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US3000453A
Expired / Lapsed
US
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Earth bit driver
Assignee: Individual
•
Filing: 1958-12-15
•
Granted: 1961-09-19
•
Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Germain William A St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:50
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US327732A
Cited
US658495A
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US836989A
Cited
US1078952A
Cited
US1295969A
Cited
US1704053A
Cited
US1682438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |