US2444724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing for rock bits
Assignee: Chicago Pneumatic Tool Co LLC
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Filing: 1944-09-19
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Granted: 1948-07-06
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Expires: 1964-09-19
Abstract
No abstract record available.
Inventors
- 👤 Robinson W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:29
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/54; E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; F16C19/49; F16C19/50; F16C19/505; F16C19/56; F16C2352/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US846908A
Cited
US1928627A
Cited
US2034545A
Cited
US2294629A
Cited
US2373369A
Cited
US2329751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |