US2562346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling tool
Assignee: Globe Oil Tools Co
•
Filing: 1945-10-19
•
Granted: 1951-07-31
•
Expires: 1965-10-19
Abstract
No abstract record available.
Inventors
- 👤 Charles E Whittaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:31
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1803267A
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US961115A
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US1388424A
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US1378056A
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US1426681A
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US1577875A
Cited
US1515819A
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US1535572A
Cited
US1844371A
Cited
US1902174A
Cited
US2034075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |