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Patent US2988758A successfully refreshed from Google Patents.
US2988758A
Expired / Lapsed
US
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Mechanism for raising and lowering frame and mattress portions of hospital beds
Assignee: Individual
•
Filing: 1957-11-12
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Granted: 1961-06-20
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Expires: 1977-11-12
Abstract
No abstract record available.
Inventors
- 👤 Armand J Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:26
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/002; A61G7/015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2458720A
Cited
US660750A
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US2185215A
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US2579472A
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US2630720A
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US2590337A
Cited
US2709515A
Cited
US2747421A
Cited
US2807174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |