Patent US3965783A successfully refreshed from Google Patents.
Patent US2666477A successfully refreshed from Google Patents.
US2666477A
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US
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Zigzag spring seat back having alternate springs of different lengths and form
Assignee: American Metal Products Co
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Filing: 1949-12-16
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Granted: 1954-01-19
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Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
- 👤 Hyland C Flint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:26
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/30; B; B60; B60N; B60N2/00; B60N2/70; B60N2/7094
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1728289A
Cited
US2214136A
Cited
US2241552A
Cited
US2251049A
Cited
US2330906A
Cited
US2407933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |