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US2645793A
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Nut piercing method
Assignee: National Machinery Co
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Filing: 1949-06-17
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Granted: 1953-07-21
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Expires: 1969-06-17
Abstract
No abstract record available.
Inventors
- 👤 John H Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:26
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/32; B60G11/34; B60G11/36; B21; B21K; B21K1/00; B21K1/64; H; H04; H04J; H04J1/00; H04J1/02; H04J1/04; H04J1/045; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2209; Y10T83/2213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US490773A
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US834372A
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US1100891A
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US1795518A
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US1977163A
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US2287214A
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US2380584A
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US2419862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |