Patent US2644959A successfully refreshed from Google Patents.
US2644959A
Expired / Lapsed
US
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Center support unit for bedframes
Assignee: Harvard Manufacturing Co
•
Filing: 1949-03-22
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Granted: 1953-07-14
•
Expires: 1969-03-22
Abstract
No abstract record available.
Inventors
- 👤 Nathan E Blanke
- 👤 Hillard J Sands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:02
CPC Classifications
A; A47; A47C; A47C19/00; A47C19/02; A47C19/021; A47C19/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US610698A
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US1368510A
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GB190313014A
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GB190401135A
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US803049A
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US905764A
Cited
GB190820137A
Cited
US1705297A
Cited
US1887551A
Cited
US1842054A
Cited
US2575651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |