US2994890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring reinforced mattresses
Assignee: Day International Corp
•
Filing: 1956-11-08
•
Granted: 1961-08-08
•
Expires: 1976-11-08
Abstract
No abstract record available.
Inventors
- 👤 William T Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:15
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/14; A47C27/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1725479A
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FR709641A
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US2194036A
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US2194569A
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GB539958A
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US2192601A
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US2247543A
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US2415765A
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US2757415A
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US2785440A
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US2830306A
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US2882959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |