Patent US2595903A successfully refreshed from Google Patents.
US2595903A
Expired / Lapsed
US
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Rock bit radial bearing
Assignee: SECURITY ENGINEERING Co Inc
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Filing: 1948-04-03
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Granted: 1952-05-06
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Expires: 1968-04-03
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Swart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:07
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1388424A
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US1747394A
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US1656471A
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US1885266A
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US2098758A
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US2081201A
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US2086681A
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US2192697A
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US2184129A
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US2297192A
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US2339161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |