US4824730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
IR Radiation heating element
Assignee: Panasonic Holdings Corp
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Filing: 1988-06-21
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Granted: 1989-04-25
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Expires: 2008-06-21
Abstract
Abstract An IR radiation heating element comprising a substrate and a coating film formed thereon from a coating composition for IR radiation heating which comprises an oxide of a transition metal or a mixed oxide of transition metals, ZrO 2 and polyborosiloxane, which element has improved IR radiation efficiency when heated.
Inventors
- 👤 Akio Fukuda
- 👤 Yasunori Kaneko
- 👤 Masao Maki
- 👤 Mamoru Isogai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:12
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C09; C09D; C09D183/00; C09D183/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
36 words
An IR radiation heating element comprising a substrate and a coating film formed on the substrate from a coating composition for IR radiation heating which comprises an oxide of a transition metal, ZrO 2 and polyborosiloxane.
Claim 2
Dependent Claim
36 words
An IR radiation heating element comprising a substrate and a coating film formed on the substrate from a coating composition for IR radiation heating which comprises an oxide of a transition metal, ZrO 2 and polyborosiloxane.
Claim 3
Dependent Claim
32 words
The IR radiation heating element according to claim 1, wherein the oxide of the transition metal is an oxide of a metal selected from the group consisting of iron, manganese, and copper.
Claim 4
Dependent Claim
32 words
The IR radiation heating element according to claim 1, wherein the oxide of the transition metal is an oxide of a metal selected from the group consisting of nickel, cobalt and chromium.
Claim 5
Dependent Claim
86 words
The IR radiation heating element according to claim 1, wherein the oxide of the transition metal is at least one oxide selected from the group consisting of Al 2 O 3 , SiO 2 , TiO 2 , V 2 O 5 , Fe 2 O 3 , NiO, Y 2 O 3 , ZrO 2 , La 2 O 3 , Co 2 O 3 , CoO, Mn 2 O 3 , MnO 2 , CuO, Cu 2 O and Cr 2 O 3 .
Claim 6
Dependent Claim
38 words
The IR radiation heating element according to claim 1, wherein particle surfaces of ZrO 2 is coated with at least one oxide selected the group consisting of Al 2 O 3 , SiO 2 and TiO 2 .
Claim 7
Dependent Claim
24 words
The IR radiation heating element according to claim 1, wherein the oxide of the transition metal is a mixed oxide of the transition metals.
Claim 8
Dependent Claim
22 words
The IR radiation heating element according to claim 6, wherein the mixed oxide is a mixed oxide of iron, manganese and copper.
Claim 9
Dependent Claim
22 words
The IR radiation heating element according to claim 6, wherein the mixed oxide is a mixed oxide of nickel, copper and chromium.
Claim 10
Dependent Claim
38 words
The IR radiation heating element according to claim 6, wherein particle surfaces of ZrO 2 is coated with at least one oxide selected the group consisting of Al 2 O 3 , SiO 2 and TiO 2 .
Claim 11
Dependent Claim
18 words
The IR radiation heating element according to claim 1, wherein the coating composition further comprises MgO and mica.
Claim 12
Dependent Claim
15 words
The IR radiation heating element according to claim 1, wherein the substrate is externally heatable.
Claim 13
Dependent Claim
15 words
The IR radiation heating element according to claim 1, wherein the substrate is internally heatable.
References Cited (Backward Citations)
US4405687A
Cited
US4361679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |