US4481686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air fluidized bed for therapeutic use
Assignee: Hill Rom Services Inc
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Filing: 1983-03-21
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Granted: 1984-11-13
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Expires: 2003-03-21
Abstract
Abstract An air-fluidized bed for therapeutic use of the type comprising a tank filled with a particulate material through which passes an upward flow of gas. According to the invention, particles of spherical shape, with a density higher than that of the particulate material, and which have a greater biochemical activity than the particulate material, are introduced in the tank. Application: control of the bactericidal activity of an air-fluidized bed.
Inventors
- 👤 Francois R. Lacoste
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:56
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61G; A61G7/00; A61G7/05; A61G7/057; A61G7/05738; A61G7/05746
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
An air-fluidized bed for therapeutic use comprising a tank filled with a particulate material through which air flows upwardly, the material being covered by a porous sheet, characterized by the introduction, in said particulate material, of spherical particles having a size of the same order of magnitude as said particulate material and greater biochemical activity than said particulate material, said particles having a density higher than that of said particulate material.
Claim 2
Dependent Claim
71 words
An air-fluidized bed for therapeutic use comprising a tank filled with a particulate material through which air flows upwardly, the material being covered by a porous sheet, characterized by the introduction, in said particulate material, of spherical particles having a size of the same order of magnitude as said particulate material and greater biochemical activity than said particulate material, said particles having a density higher than that of said particulate material.
Claim 3
Dependent Claim
33 words
An air-fluidized bed according to claim 1, characterized by the fact that said particles are made of at least one element selected from the class consisting of calcium, magnesium, aluminum, bismuth and silicon.
Claim 4
Dependent Claim
57 words
An air-fluidized bed for therapeutic use comprising a tank filled with a particulate material through which air flows upwardly, the material being covered by a porous sheet, characterized by the introduction, in said particulate material, of particles having greater biochemical activity than said particulate material, said particles having a density higher than that of said particulate material.
Claim 5
Dependent Claim
57 words
An air-fluidized bed for therapeutic use comprising a tank filled with a particulate material through which air flows upwardly, the material being covered by a porous sheet, characterized by the introduction, in said particulate material, of particles having greater biochemical activity than said particulate material, said particles having a density higher than that of said particulate material.
Claim 6
Dependent Claim
33 words
An air-fluidized bed according to claim 3, characterized by the fact that said particles are made of at least one element selected from the class consisting of calcium, magnesium, aluminum, bismuth and silicon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |