US3587569A
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Assignee: AMERICAN REHABILITATION FOUNDA
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Filing: 1968-10-14
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Granted: 1971-06-28
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Expires: 1988-10-14
Abstract
Abstract A MECHANICAL DROP SEAT HAVING A VERTICALLY MOVABLE CENTRAL SEAT MEMBER. A SLIDE AND LEVER MECHANISM CONNECTED TO THE CENTRAL SEAT MEMBER IS OPERATED BY A HAND MOVABLE LEVER TO SELECTIVELY RAISE AND LOWER THE CENTRAL SEAT MEMBER TO VARY THE LOCATIONS OF THE PRESSURES ON THE POSTERIOR OF A PERSON. THE INVENTION DESCRIBED HEREIN WAS MADE IN THE COURSE OF, OR UNDER A GRANT WITH THE DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE.
Inventors
- 👤 Lorrin H Madsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:31
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/1043; A61G5/1045; A61H; A61H1/00; A61H1/008; A61G7/00; A61G7/05; A61G7/057
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |