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US2607562A
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US
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Self-piloted rotary drill bit
Assignee: Individual
•
Filing: 1951-03-19
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Granted: 1952-08-19
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Expires: 1971-03-19
Abstract
No abstract record available.
Inventors
- 👤 Phipps Orville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:51
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62; E21B10/26; E21B10/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1096134A
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US1547459A
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US1847302A
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US1887373A
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US1902513A
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US2504978A
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US2578593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |