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Patent US2592277A successfully refreshed from Google Patents.
US2592277A
Expired / Lapsed
US
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Bearing for gauge cutters of rotary rock bits
Assignee: SECURITY ENGINEERING Co Inc
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Filing: 1948-05-15
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Granted: 1952-04-08
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Expires: 1968-05-15
Abstract
No abstract record available.
Inventors
- 👤 Hammer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:36
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1306694A
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US1657501A
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US1747394A
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DE474698C
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US2047114A
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US2171057A
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US2147927A
Cited
US2234198A
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US2507776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |