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US2422806A
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Drill bit pressure gauge
Assignee: Stanolind Oil and Gas Co
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Filing: 1944-04-28
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Granted: 1947-06-24
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Expires: 1964-04-28
Abstract
No abstract record available.
Inventors
- 👤 Silverman Daniel
- 👤 Gilmartin Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:47
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0904; B23Q17/0919; B23Q17/0947; Y; Y10; Y10S; Y10S73/00; Y10S73/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1930905A
Cited
US2283429A
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US2183078A
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US2344642A
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US2315127A
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US2372582A
Cited
US2380520A
Cited
US2346838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |