US2426478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill grinder
Assignee: Individual
•
Filing: 1942-09-01
•
Granted: 1947-08-26
•
Expires: 1962-09-01
Abstract
No abstract record available.
Inventors
- 👤 Jack Van H Whipple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:52
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/26; B24B3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1324497A
Cited
US273632A
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GB190009930A
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US777247A
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GB190823609A
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US966732A
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US997961A
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US1020860A
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US1341500A
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US1367686A
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US1388039A
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US1477426A
Cited
US1417364A
Cited
US1586523A
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GB455661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |