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Patent US2829880A successfully refreshed from Google Patents.
US2829880A
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US
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Formed spring units and spring assemblies of sinuous design
Assignee: SAGINAW WIRE PRODUCTS Inc
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Filing: 1957-01-18
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Granted: 1958-04-08
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Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 Lynn W Staples
- 👤 Raymond D Strout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:18
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/30; A47C23/00; A47C23/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |