US2790471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power driven screw driver
Assignee: Individual
•
Filing: 1955-07-19
•
Granted: 1957-04-30
•
Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Clinton L Graybill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/0064; B25B21/00; B25B23/14; B25B23/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US702934A
Cited
US1196839A
Cited
US1539782A
Cited
FR625352A
Cited
FR686370A
Cited
DE891680C
Cited
CH264386A
Cited
US2658538A
Cited
US2705030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |