US2575332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill
Assignee: THOMAS H COFFEY
•
Filing: 1946-06-19
•
Granted: 1951-11-20
•
Expires: 1966-06-19
Abstract
No abstract record available.
Inventors
- 👤 Harry D Cummins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:42
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/0002; B23B51/0003; B23B51/00035; Y; Y10; Y10S; Y10S76/00; Y10S76/11; Y10T; Y10T408/00; Y10T408/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1859978A
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US1826085A
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US1901654A
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US1847302A
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US1908887A
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US1927818A
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US2089481A
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US2337322A
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US2325535A
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US2346546A
Cited
US2418021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |