US2644369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broaching machine
Assignee: Nachi Machining Technology Co
•
Filing: 1948-05-17
•
Granted: 1953-07-07
•
Expires: 1968-05-17
Abstract
No abstract record available.
Inventors
- 👤 Walter S Praeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:33
CPC Classifications
B; B23; B23D; B23D37/00; B23D37/02; B23D37/04; Y; Y10; Y10T; Y10T407/00; Y10T407/16; Y10T409/00; Y10T409/10; Y10T409/109063; Y10T409/109222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1318488A
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US1089376A
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US1218191A
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US1925837A
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US1978458A
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GB424956A
Cited
US2173901A
Cited
US2357094A
Cited
US2161901A
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US2317514A
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US2408521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |