Patent US3645560A successfully refreshed from Google Patents.
Patent US5028760A successfully refreshed from Google Patents.
US5028760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared heater
Assignee: Senju Metal Industry Co Ltd
•
Filing: 1989-03-15
•
Granted: 1991-07-02
•
Expires: 2009-03-15
Abstract
Abstract An infrared electric panel heater includes an open side covered by a sintered or electroformed porous metallic panel. An electric sheathed heating element is installed in the housing in contact with the inner surface of the porous panel. The outer surface of the porous panel is substantially entirely covered with a ceramic layer, selected from the group consisting of Al 2 O 3 , TiO 2 , Cr 2 O 3 , Mg O, ZrO 2 , SiO 2 and mixture thereof, which emits far-infrared rays when heated.
Inventors
- 👤 Shigeru Okuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:36
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/24; F; F24; F24C; F24C7/00; F24C7/04; F24C7/043; H05B3/10; H05B3/40; H05B3/42; H05B3/48; H05B2203/00; H05B2203/002; H05B2203/003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
An infrared panel heater comprising: a housing having an opening in a side thereof; an electric heating element installed in said housing; and a porous metallic panel manufactured by sintering or electroforming to produce a three dimensional network structure, said panel covering said opening and having a ceramic layer on its outer surface, said ceramic layer covering substantially the entire outer surface of the metal panel which can emit far-infrared rays when heated, with a inner surface of the porous metallic panel being disposed in contact with the electric heating element.
Claim 2
Dependent Claim
91 words
An infrared panel heater comprising: a housing having an opening in a side thereof; an electric heating element installed in said housing; and a porous metallic panel manufactured by sintering or electroforming to produce a three dimensional network structure, said panel covering said opening and having a ceramic layer on its outer surface, said ceramic layer covering substantially the entire outer surface of the metal panel which can emit far-infrared rays when heated, with a inner surface of the porous metallic panel being disposed in contact with the electric heating element.
Claim 3
Dependent Claim
16 words
An infrared panel heater as claimed in claim 1, wherein said housing is a box-shaped one.
Claim 4
Dependent Claim
23 words
An infrared heater as claimed in claim 1, wherein said porous metallic panel is made of a porous metallic plate manufactured by electroforming.
Claim 5
Dependent Claim
48 words
An infrared panel heater as claimed in claim 1, wherein said ceramic layer is made of a ceramic material selected from the group consisting of Al 2 O 3 , TiO 2 , Cr 2 O 3 , MgO, ZrO 2 , SiO 2 , and mixtures thereof.
References Cited (Backward Citations)
GB850225A
Cited
GB841913A
Cited
US3539770A
Cited
US3604894A
Cited
US3564200A
Cited
FR2446444A1
Cited
JPS5685619A
Cited
JPS59205531A
Cited
US4626659A
Cited
US4565917A
Cited
US4565917B1
Cited
US4798192A
Cited
GB2201320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |