Patent US2421864A successfully refreshed from Google Patents.
US2421864A
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US
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Angle punch unit
Assignee: Boeing Co
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Filing: 1945-09-04
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Granted: 1947-06-10
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Expires: 1965-09-04
Abstract
No abstract record available.
Inventors
- 👤 Henry J Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:33
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/32; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8742; Y10T83/8821; Y10T83/8828; Y10T83/883; Y10T83/8841; Y10T83/8843; Y10T83/929; Y10T83/9457; Y10T83/9473; Y10T83/9483
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE440076C
Cited
US1671619A
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US1812046A
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US2202894A
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US2340162A
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US2329020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-09 | 1950-12-09 | 1951-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-09 | 1954-12-09 | 1955-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-09 | 1958-12-09 | 1959-06-10 | $7700.00 | Window Closed / Lapsed |