US2424712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draw unit
Assignee: DAVENPORT MACHINE AND FOUNDRY
•
Filing: 1944-05-11
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Granted: 1947-07-29
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Expires: 1964-05-11
Abstract
No abstract record available.
Inventors
- 👤 Charles F Scherer
- 👤 Charles C Popp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:34
CPC Classifications
B; B22; B22C; B22C11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1316261A
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US961702A
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US891508A
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US976833A
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FR424696A
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US1181493A
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US1497021A
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US1656951A
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US1874636A
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US2306323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |