Patent US2565274A successfully refreshed from Google Patents.
US2565274A
Expired / Lapsed
US
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Cutter for drill pipe protectors
Assignee: THOMAS P PIKE DRILLING CO
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Filing: 1949-03-21
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Granted: 1951-08-21
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Expires: 1969-03-21
Abstract
No abstract record available.
Inventors
- 👤 Clyde R Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:50
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/006; E21B17/10; E21B17/1042; E21B17/12; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/892; Y10T408/895; Y10T82/00; Y10T82/16; Y10T83/00; Y10T83/869; Y10T83/8771; Y10T83/929; Y10T83/9454
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1270038A
Cited
US1420847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |