US2473709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for manufacturing spherical gears
Assignee: Siemens Industry Inc
•
Filing: 1943-05-04
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Granted: 1949-06-21
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Expires: 1963-05-04
Abstract
No abstract record available.
Inventors
- 👤 John H Hitchcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:33
CPC Classifications
B; B23; B23F; B23F19/00; B23F19/002; B23F19/007; B23F5/00; B23F5/20; B23F5/22; 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)
US1036199A
Cited
US1639624A
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US2211611A
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US2273050A
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US2282288A
Cited
US2315068A
Cited
US2307428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |