Patent US2425409A successfully refreshed from Google Patents.
US2425409A
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Toolholder
Assignee: ROBERT H CLARK
•
Filing: 1944-02-21
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Granted: 1947-08-12
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Expires: 1964-02-21
Abstract
No abstract record available.
Inventors
- 👤 Harry C Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:58
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/16; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2272; Y10T407/2282; Y10T407/2292; Y10T407/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US829081A
Cited
GB190603668A
Cited
FR489307A
Cited
FR21028E
Cited
US1420171A
Cited
US1648380A
Cited
US2013701A
Cited
US2136592A
Cited
US2210605A
Cited
US2314665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |