Patent US4509219A successfully refreshed from Google Patents.
US4509219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sleeping mattress
Assignee: Japan Life Co Ltd
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Filing: 1983-10-12
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Granted: 1985-04-09
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Expires: 2003-10-12
Abstract
Abstract A sleeping mattress comprises in order a first layer made of cushion material formed with wave-like projections, a second layer having semi-circular projections provided with permanent magnets, a third layer stuffed with palm fibers and reinforcing materials, and a fourth layer composed of cushion materials. A magnetic curing effect by the magnets and a spine balancing effect by moderate hardness are obtained during sleeping, and comfortable sleeping may be achieved.
Inventors
- 👤 Toshizo Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:32
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/14; A47C27/142; A47C27/144; A47C21/00; A47C27/146; A47C27/15; A47C27/22; A47C31/00; A47C31/003; A61; A61N; A61N2/00; A61N2/06; Y; Y10; Y10S; Y10S5/00; Y10S5/906; Y10S5/948; Y10S5/951
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A sleeping mattress comprising, in order: a first layer made of cushion material, having a plurality of holes therein, formed with an undulated outer surface; a second layer having semicircular projections provided with magnets, said semicircular projections being mated with said holes; a third layer stuffed with fibers and reinforcing materials; and a fourth layer comprising cushion material.
Claim 2
Dependent Claim
58 words
A sleeping mattress comprising, in order: a first layer made of cushion material, having a plurality of holes therein, formed with an undulated outer surface; a second layer having semicircular projections provided with magnets, said semicircular projections being mated with said holes; a third layer stuffed with fibers and reinforcing materials; and a fourth layer comprising cushion material.
Claim 3
Dependent Claim
21 words
A sleeping mattress as claimed in claim 1, wherein each of said permanent magnets has both poles on one side thereof.
Claim 4
Dependent Claim
33 words
A sleeping mattress as claimed in claim 1, wherein said permanent magnets are disposed at points corresponding to the shoulders, arms, spine, waist and legs of a human being lying upon said mattress.
Claim 5
Dependent Claim
17 words
A sleeping mattress as claimed in claim 1, wherein each of the permanent magnets is 850 gauss.
Claim 6
Dependent Claim
17 words
A sleeping mattress as claimed in claim 1, wherein the permanent magnets are positioned on said projections.
Claim 7
Dependent Claim
15 words
A sleeping mattress as claimed in claim 1, wherein the reinforcing materials are steel wires.
Claim 8
Dependent Claim
31 words
A sleeping mattress as claimed in claim 1, wherein the semi-circular shapes of the projections holding the magnets therein are supported by means of convex regions formed in the third layer.
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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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |