Patent US2473445A successfully refreshed from Google Patents.
US2473445A
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US
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Spring cambering machine
Assignee: Eaton Corp
•
Filing: 1947-04-11
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Granted: 1949-06-14
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Expires: 1967-04-11
Abstract
No abstract record available.
Inventors
- 👤 George R Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:45
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1713137A
Cited
US1867331A
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US1990707A
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US2022532A
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US2217333A
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US2243174A
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US2261624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |