US4455479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric oven toaster
Assignee: Toshiba Corp
•
Filing: 1982-04-08
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Granted: 1984-06-19
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Expires: 2002-04-08
Abstract
Abstract A cooking appliance comprising a heating chamber with a window provided on one side. At least one surface of the window is coated with a film of a reflecting metal oxide, such as indium oxide, to such a thickness that food in the heating chamber can be seen through the window.
Inventors
- 👤 Takehiko Itoh
- 👤 Moriyoshi Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:22
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/0623; A47J37/0629; A47J37/0635; C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C03C17/34; C03C17/3411; C03C17/3417; F; F24; F24C; F24C15/00; F24C15/02; F24C15/04; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/215; C03C2217/90; C03C2217/94; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/151
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
207 words
An electric oven-toaster adapted for toasting a slice of bread, comprising: a housing enclosing a heating chamber, said housing having a front wall; a glass window, which can be freely opened and closed, forming part of said front wall of said housing; food holding means disposed horizontally within said heating chamber; heating means disposed within said heating chamber for generating infrared rays, said heating means being parallel with both the inner surface of said glass window and said food holding means; a metal holding reflecting plate disposed within said heating chamber and bent in a manner to surround said heating means and said food holding means to reflect said infrared rays generated by said heating means such that said reflected infrared rays are substantially uniformly distributed on said food holding means; and an infrared reflective film of metal oxide formed on the entire inner surface of said glass window; said glass window being positioned in a manner to provide a predetermined free space between the side edge of said food holding means on the side of said glass window and the lower edge of said glass window and being inclined in a manner to reflect said infrared rays toward said free space and said food holding means.
Claim 2
Dependent Claim
207 words
An electric oven-toaster adapted for toasting a slice of bread, comprising: a housing enclosing a heating chamber, said housing having a front wall; a glass window, which can be freely opened and closed, forming part of said front wall of said housing; food holding means disposed horizontally within said heating chamber; heating means disposed within said heating chamber for generating infrared rays, said heating means being parallel with both the inner surface of said glass window and said food holding means; a metal holding reflecting plate disposed within said heating chamber and bent in a manner to surround said heating means and said food holding means to reflect said infrared rays generated by said heating means such that said reflected infrared rays are substantially uniformly distributed on said food holding means; and an infrared reflective film of metal oxide formed on the entire inner surface of said glass window; said glass window being positioned in a manner to provide a predetermined free space between the side edge of said food holding means on the side of said glass window and the lower edge of said glass window and being inclined in a manner to reflect said infrared rays toward said free space and said food holding means.
Claim 3
Dependent Claim
23 words
An electric oven-toaster according to claim 1, wherein said means for supporting food has a plane surface on which said food is placed.
Claim 4
Dependent Claim
25 words
An electric oven-toaster according to claim 2, wherein said heating means is comprised of two electric heaters disposed above and below said supporting means respectively.
Claim 5
Dependent Claim
22 words
An electric oven-toaster according to claim 3, wherein said metal oxide film is an indium oxide film of 1500 to 3000Å thick.
Claim 6
Dependent Claim
21 words
An electric oven-toaster according to claim 4, wherein a silica film is formed on the surface of said indium oxide film.
References Cited (Backward Citations)
USRE24296E
Cited
US24296A
Cited
US2676117A
Cited
US2864932A
Cited
GB795912A
Cited
US3693538A
Cited
GB1339469A
Cited
GB1341616A
Cited
GB1392458A
Cited
US4048978A
Cited
GB1417333A
Cited
DE2417927A1
Cited
US4035608A
Cited
US4096369A
Cited
US4100330A
Cited
US4343985A
Cited
GB2013874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |