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US2472644A
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Gear hobbing machine attachment
Assignee: N R KNEASS
•
Filing: 1945-03-17
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Granted: 1949-06-07
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Expires: 1965-03-17
Abstract
No abstract record available.
Inventors
- 👤 John W Barcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:17
CPC Classifications
B; B23; B23F; B23F5/00; B23F5/20; B23F5/22; B23F19/00; B23F19/002; B23F19/007; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/10159; Y10T409/102544; Y10T409/102703; Y10T409/102862; Y10T409/10318
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1639624A
Cited
US2315068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |