US2614810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary bit
Assignee: Reed Roller Bit Co
•
Filing: 1947-06-16
•
Granted: 1952-10-21
•
Expires: 1967-06-16
Abstract
No abstract record available.
Inventors
- 👤 Charles C Goolsbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:49
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1932487A
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US2198849A
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US2321484A
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US2297157A
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US2380112A
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US2446795A
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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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |