Patent US2550775A successfully refreshed from Google Patents.
US2550775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic screw driver
Assignee: Individual
•
Filing: 1949-07-13
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Granted: 1951-05-01
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Expires: 1969-07-13
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:46
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/08; B25B23/12; Y; Y10; Y10S; Y10S403/00; Y10S403/01; Y10S7/00; Y10S7/901; Y10T; Y10T279/00; Y10T279/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US733126A
Cited
FR486294A
Cited
US1887216A
Cited
US2010616A
Cited
US2116775A
Cited
US2174327A
Cited
US2260055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |