Patent US2821722A successfully refreshed from Google Patents.
US2821722A
Expired / Lapsed
US
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Bed lifting device
Assignee: Individual
•
Filing: 1953-09-17
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Granted: 1958-02-04
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Expires: 1973-09-17
Abstract
No abstract record available.
Inventors
- 👤 Victor E Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:53
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/002; A61G7/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US608619A
Cited
US1630792A
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CH19861A
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US923525A
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US1277712A
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US1275751A
Cited
US1789025A
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US2650795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |