Patent US2697470A successfully refreshed from Google Patents.
US2697470A
Expired / Lapsed
US
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Spring winding machine
Assignee: Madison Management Group Inc
•
Filing: 1951-04-02
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Granted: 1954-12-21
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Expires: 1971-04-02
Abstract
No abstract record available.
Inventors
- 👤 Peter M Sampatacos
- 👤 Jr Edward E Franks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:44
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/04
Claims Analysis
Total Claims: 0
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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) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |