US2673128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth-boring drill
Assignee: Individual
•
Filing: 1949-10-08
•
Granted: 1954-03-23
•
Expires: 1969-10-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:43
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; F; F16; F16C; F16C19/00; F16C19/54; F16C2352/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2038387A
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US2177333A
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US2210077A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |