US2513634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cone bit bearing
Assignee: Reed Roller Bit Co
•
Filing: 1946-04-19
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Granted: 1950-07-04
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Expires: 1966-04-19
Abstract
No abstract record available.
Inventors
- 👤 Walter C Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:16
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; F; F16; F16C; F16C21/00; F16C2352/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |