Patent US4574411A successfully refreshed from Google Patents.
US4574411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pillow
Assignee: Japan Life Co Ltd
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Filing: 1983-10-12
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Granted: 1986-03-11
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Expires: 2003-10-12
Abstract
Abstract An improved pillow is provided by inserting cushion material fixed with a plurality of porcelain tiles on its surface, into a bag body having permeability and elasticity. Its shape is held during use, and natural sleeping posture is maintained, and the porcelain tile cools the head moderately for comfortable sleep.
Inventors
- 👤 Toshizo Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:53
CPC Classifications
A; A47; A47C; A47C21/00; A47C21/04; A47C21/042; A47C21/046; A47C27/00; A47C27/002; A47C27/007; A47G; A47G9/00; A47G9/10; A47G9/1036
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
An improved pillow, comprising a core formed of cushion material having attached to its surface a plurality of ceramic tiles, said core being inserted into a hollow body having permeability and elasticity, said hollow body being formed of a flexible plastic foam the outer surface of which is harder than the remainder of said flexible foam, said ceramic tiles being maintained in position on the surface of said core via at least one spacer comprising a plate having a shape corresponding to at least one space between the ceramic tiles, said at least one spacer being located on said core between adjacent ceramic tiles.
Claim 2
Dependent Claim
104 words
An improved pillow, comprising a core formed of cushion material having attached to its surface a plurality of ceramic tiles, said core being inserted into a hollow body having permeability and elasticity, said hollow body being formed of a flexible plastic foam the outer surface of which is harder than the remainder of said flexible foam, said ceramic tiles being maintained in position on the surface of said core via at least one spacer comprising a plate having a shape corresponding to at least one space between the ceramic tiles, said at least one spacer being located on said core between adjacent ceramic tiles.
Claim 3
Dependent Claim
19 words
A pillow as claimed in claim 1, wherein said foam plastic of said hollow body is of urethane foam.
Claim 4
Dependent Claim
21 words
A pillow according to claim 2, wherein said urethane foam hollow body has wave-like projections formed regularly lengthwise and cross-wise thereon.
Claim 5
Dependent Claim
28 words
A pillow as claimed in claim 3, wherein said hollow body is provided with its said harder outer surface by impregnating said urethane foam with a resin liquid.
Claim 6
Dependent Claim
14 words
A pillow as claimed in claim 1, wherein the care comprises thick urethane foam.
Claim 7
Dependent Claim
17 words
A pillow according to claim 1 wherein said at least one spacer plate is formed of plastic.
Claim 8
Dependent Claim
25 words
A pillow as claimed in claim 6, wherein said at least one plastic spacer plate is of urethane foam hardened by impregnation with resin liquid.
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) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |