US2754091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit
Assignee: Reed Roller Bit Co
•
Filing: 1948-10-22
•
Granted: 1956-07-10
•
Expires: 1968-10-22
Abstract
No abstract record available.
Inventors
- 👤 Clement M Kucera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:22
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/18; E21B10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1670092A
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US1723330A
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US1908693A
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US1908656A
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US2047114A
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US2068375A
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US2066671A
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US2108955A
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US2166664A
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US2201570A
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US2293259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |