Patent US6336933B1 successfully refreshed from Google Patents.
US2600286A
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US
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Drill bit
Assignee: BELL MACHINE Co
•
Filing: 1947-09-08
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Granted: 1952-06-10
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Expires: 1967-09-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence H Weiland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:33
CPC Classifications
B; B27; B27G; B27G15/00; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/899
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US270977A
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US306907A
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US374432A
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US404197A
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US528725A
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US1538680A
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GB364750A
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US2230645A
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US2215939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |