Patent US4817707A successfully refreshed from Google Patents.
US4817707A
Expired / Lapsed
US
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Heating soft floor mat
Assignee: Ryowa Corp
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Filing: 1987-09-21
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Granted: 1989-04-04
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Expires: 2007-09-21
Abstract
Abstract A heating soft floor mat is described comprising a base sheet composed of a thermoplastic resin foamed article as a heat insulating layer having meanderingly formed thereon grooves for conduits, conduits for heating medium disposed in the grooves, and cover material having flexibility covering the surface side thereof, wherein the thermoplastic resin foamed article is a crosslinked polyethylene foamed article containing closed cells having a degree of expansion of from 10 to 40 and the conduits are composed of low density crosslinked polyethylene having a density of less than 0.910 g/cm 3 .
Inventors
- 👤 Kazuo Aoyama
- 👤 Yukitaka Murata
- 👤 Kiyoshi Hattori
- 👤 Akio Okamoto
- 👤 Kiyoshi Takahashi
- 👤 Takashi Sasaki
- 👤 Shigeko Hanari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:38
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/12; F24D3/16; Y; Y02; Y02B; Y02B30/00; Y10; Y10S; Y10S165/00; Y10S165/044; Y10S165/905
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A heating soft floor mat comprising a base sheet composed of a thermoplastic resin foamed article as a heat insulating layer having meanderingly formed thereon grooves for conduits, conduits for heating medium disposed in the grooves, and cover material having flexibility covering the surface side thereof, wherein the thermoplastic resin foamed article is a crosslinked polyethylene foamed article containing closed cells having a degree of expansion of from 10 to 40 and the conduits are composed of low density crosslinked polyethylene having a density of less than 0.910 g/cm 3 .
Claim 2
Dependent Claim
91 words
A heating soft floor mat comprising a base sheet composed of a thermoplastic resin foamed article as a heat insulating layer having meanderingly formed thereon grooves for conduits, conduits for heating medium disposed in the grooves, and cover material having flexibility covering the surface side thereof, wherein the thermoplastic resin foamed article is a crosslinked polyethylene foamed article containing closed cells having a degree of expansion of from 10 to 40 and the conduits are composed of low density crosslinked polyethylene having a density of less than 0.910 g/cm 3 .
Claim 3
Dependent Claim
42 words
The heating soft floor mat as claimed in claim 1, wherein said conduits are wavily disposed with an amplitude a and a wave pitch p in the limited range of 1/4d≦a≦10d and 2d≦p≦125d, wherein d is an outside diameter of the conduit.
References Cited (Backward Citations)
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JPS5241443A
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JPS59116714A
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |