US4680822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bedding incorporating far infrared radiator
Assignee: NISHIKAWA SAGYO Co Ltd
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Filing: 1986-03-12
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Granted: 1987-07-21
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Expires: 2006-03-12
Abstract
Abstract A bedding incorporates a piece or pieces of an alumina, zirconium, silicon or other specified far infrared radiating ceramic which radiates electromagnetic waves with a peak wavelength of 8 to 14 μm when heated, particularly, to a temperature approximately equal to the human body temperature.
Inventors
- 👤 Yukio Fujino
- 👤 Morihiro Kabaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:37
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/06; Y; Y10; Y10S; Y10S5/00; Y10S5/948
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
37 words
A bedding item comprising a far infrared wave radiating material therein, which material, when warmed up to approximately 36° C. by human body heat, radiates electromagnetic waves with a peak wavelength of from 8 to 14 μm.
Claim 2
Dependent Claim
37 words
A bedding item comprising a far infrared wave radiating material therein, which material, when warmed up to approximately 36° C. by human body heat, radiates electromagnetic waves with a peak wavelength of from 8 to 14 μm.
Claim 3
Dependent Claim
29 words
A bedding according to claim 1, wherein the far infrared radiator is formed of a ceramic selected from the group consisting of alumina ceramics, zirconium ceramics and silicon ceramics.
References Cited (Backward Citations)
US4139920A
Cited
US4574411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |