US2772589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power hand tool attachment
Assignee: DRILO Corp
•
Filing: 1955-02-15
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Granted: 1956-12-04
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Expires: 1975-02-15
Abstract
No abstract record available.
Inventors
- 👤 Howard F Brenholts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:13
CPC Classifications
F; F16; F16D; F16D7/00; F16D7/02; F16D7/024; F16D7/028; B; B25; B25B; B25B23/00; B25B23/14; B25B23/141; H; H02; H02K; H02K7/00; H02K7/14; H02K7/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1433590A
Cited
US1793259A
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US1777829A
Cited
US2161300A
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US2244143A
Cited
US2305637A
Cited
US2527517A
Cited
US2501386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |