US2832386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-step drill
Assignee: VAN WOOD Manufacturing CO Inc
•
Filing: 1953-08-31
•
Granted: 1958-04-29
•
Expires: 1973-08-31
Abstract
No abstract record available.
Inventors
- 👤 Leonard Van Dalen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:17
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/104; Y; Y10; Y10T; Y10T408/00; Y10T408/86; Y10T408/87; Y10T408/8725; Y10T408/8734
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US679693A
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US835125A
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GB191117756A
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US1263698A
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US2655964A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |