Patent US2806507A successfully refreshed from Google Patents.
US2806507A
Expired / Lapsed
US
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Spring winding machine
Assignee: Associated Spring Corp
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Filing: 1954-08-16
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Granted: 1957-09-17
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Charles J Stofko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:57
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US375064A
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US1696453A
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US1048352A
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US1673185A
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US2054196A
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US2120146A
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US2163019A
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US2466227A
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US2439893A
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US2705027A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |