Patent US2969122A successfully refreshed from Google Patents.
US2969122A
Expired / Lapsed
US
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Hollow drill
Assignee: NORMAN IND Inc VAN
•
Filing: 1957-01-14
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Granted: 1961-01-24
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Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Milton J Steffes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:01
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B2251/00; B23B2251/40; B23B2251/408; B23B2251/50; B23B2260/00; B23B2260/072; B23B51/0467
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US483210A
Cited
US632764A
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US799880A
Cited
US1209058A
Cited
US1271396A
Cited
US1846177A
Cited
US2524570A
Cited
US2506474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |