Patent US3678248A successfully refreshed from Google Patents.
US3678248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Household dish-heating appliance
Assignee: Individual
•
Filing: 1971-03-15
•
Granted: 1972-07-18
•
Expires: 1991-03-15
Abstract
Abstract A food heating appliance comprising a base in bowl form and a lid fitting the shape of one or several dishes to be heated. The base consists of a body of refractory material in which a first heating electrical resistance is embedded; this body is bounded by two metal plates; the lid, fitting over the base and dish or dishes, is also made of a body of refractory material in which a second heating electrical resistance is embedded and is bounded by an upper and a lower metal plate. The lower plate is polished and reflective. The resistances are preferably series-connected.
Inventors
- 👤 Yves P Tricault
- 👤 Gerard J Tricault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:44
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/004
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A food heating appliance comprising a base having a plurality of recesses and partitions separating said recesses from each other, each of said recesses fitting the shape of a dish to be heated, said base being made of a body of refractory material containing a base heating electrical wire resistance, said base being bounded by two metal plates, a lid closely fitting over said base and partitions and made of a body of heat-insulating material containing a lid heating electrical wire resistance and bounded by an upper and a lower metal plate, said lower plate being polished and reflective, said base and lid containing electrical connecting means for connecting said base heating wire resistance and lid heating wire resistance in series with each other, and said base heating resistance having a resistance value between two and four times that of said lid heating resistance.
Claim 2
Dependent Claim
144 words
A food heating appliance comprising a base having a plurality of recesses and partitions separating said recesses from each other, each of said recesses fitting the shape of a dish to be heated, said base being made of a body of refractory material containing a base heating electrical wire resistance, said base being bounded by two metal plates, a lid closely fitting over said base and partitions and made of a body of heat-insulating material containing a lid heating electrical wire resistance and bounded by an upper and a lower metal plate, said lower plate being polished and reflective, said base and lid containing electrical connecting means for connecting said base heating wire resistance and lid heating wire resistance in series with each other, and said base heating resistance having a resistance value between two and four times that of said lid heating resistance.
Claim 3
Dependent Claim
17 words
A food heating appliance as claimed in claim 1, in which said refractory material consists of sand.
Claim 4
Dependent Claim
17 words
A food heating appliance as claimed in claim 1, in which said refractory material consists of gravel.
Claim 5
Dependent Claim
20 words
A food heating appliance as claimed in claim 1, in which said two metal plates are made of aluminum sheet.
Claim 6
Dependent Claim
20 words
A food heating appliance as claimed in claim 1, in which said lower plate is made of polished stainless steel.
Claim 7
Dependent Claim
16 words
A food heating appliance as claimed in claim 1, in which said heat-insulating material is asbestos.
Claim 8
Dependent Claim
17 words
A food heating appliance as claimed in claim 1, in which said heat-insulating material is glass wool.
References Cited (Backward Citations)
US563780A
Cited
US1673568A
Cited
US1939017A
Cited
US1990412A
Cited
US2479268A
Cited
US2644880A
Cited
US2643324A
Cited
US2725457A
Cited
US3051582A
Cited
US3129317A
Cited
US3385952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |