US3745290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductively heatable utensils or vessels for heating,serving and storing food
Assignee: General Electric Co
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Filing: 1972-03-01
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Granted: 1973-07-10
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Expires: 1992-03-01
Abstract
Abstract Disclosed herein are various single wall and double-walled inductively heatable vessels for heating, serving and storing food. In general, each vessel is comprised of an inductively heatable inner part, or inner section, and an outer part, or outer section, which is not inductively heatable. For example, immediately after the vessel and food contained therein has been inductively cooked, or heated, on an induction appliance, the vessel may be rested directly on the surface of a conventional dining table without fear of burning the surface of the dining table and without fear that any of the diners will burn themselves by touching the outer part of the vessel. Such fears are abated because only the non-heated outer part of the vessel which is near room temperature touches the dining table and is safely accessible to the diners. The inductively heatable inner part, or section, of the vessel may be comprised of a vapordeposited metallic coating, metallic foil or sheet composite thereof, embedded powdered metal or coiled wires while the nonheated outer part or section may be comprised of suitable thermal insulation material such as plastics, glass, or ceramics, etc.
Inventors
- 👤 J Harnden
- 👤 W Kornrumpf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/12; A; A47; A47J; A47J27/00; A47J27/002; A47J36/00; A47J36/02; A47J39/00; Y; Y10; Y10S; Y10S220/00; Y10S220/902
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
278 words
An inductively heatable vessel for cooking food, storing heated food and adaptable for use as a heated food serving vessel while supported on a vessel support means comprising: a first wall member forming a first container with a first cavity which is adapted for receiving food, said first wall member having an inner wall surface adjacent the first cavity and an outer wall surface, said first wall member being of a material in which no significant heating curreNt is induced when the material of said first wall member is subjected to a changing magnetic field; inductively heatable means covering at least a part of the first walled member''s inner wall surface, said inductively heatable means being of a material in which significant electrical heating current is induced when said material is subjected to a changing magnetic field; and, a second wall member forming a second container defining a second cavity and having an inner wall surface and an outer wall surface, said second wall member being of a thermal insulation material in which no significant electrical heating current is induced when said material is subjected to a changing magnetic field, said first container being received in the second cavity of said second container such that the outer wall surface of the first wall member and the inner wall surface of the second wall member enclose a space between said first and second containers, said outer wall surface of the second wall member including a portion which is adapted to contact the vessel support means whereby said second container with said first container received therein may be supported in a condition of stable equilibrium on the vessel support means.
Claim 2
Dependent Claim
278 words
An inductively heatable vessel for cooking food, storing heated food and adaptable for use as a heated food serving vessel while supported on a vessel support means comprising: a first wall member forming a first container with a first cavity which is adapted for receiving food, said first wall member having an inner wall surface adjacent the first cavity and an outer wall surface, said first wall member being of a material in which no significant heating curreNt is induced when the material of said first wall member is subjected to a changing magnetic field; inductively heatable means covering at least a part of the first walled member''s inner wall surface, said inductively heatable means being of a material in which significant electrical heating current is induced when said material is subjected to a changing magnetic field; and, a second wall member forming a second container defining a second cavity and having an inner wall surface and an outer wall surface, said second wall member being of a thermal insulation material in which no significant electrical heating current is induced when said material is subjected to a changing magnetic field, said first container being received in the second cavity of said second container such that the outer wall surface of the first wall member and the inner wall surface of the second wall member enclose a space between said first and second containers, said outer wall surface of the second wall member including a portion which is adapted to contact the vessel support means whereby said second container with said first container received therein may be supported in a condition of stable equilibrium on the vessel support means.
Claim 3
Dependent Claim
38 words
The vessel according to claim 1 wherein said inductively heatable means covering at least part of the first wall member''s inner wall surface is a metallic material which is a vapor-deposited coating bonded to said inner wall surface.
Claim 4
Dependent Claim
38 words
The vessel according to claim 1 wherein said inductively heatable means covering at least part of said first wall member''s inner wall surface is a lining of metallic material on said inner wall surface and is bonded thereto.
Claim 5
Dependent Claim
36 words
The vessel according to claim 1 wherein said inductively heatable means covering at least part of said first wall member''s inner wall surface is a disposable liner of metallic material positionable on said inner wall surface.
Claim 6
Dependent Claim
31 words
The vessel according to claim 1 wherein said inductively heatable means is spatially distributed to enable achievement of a predetermined temperature profile along said inner wall of said first wall member.
Claim 7
Dependent Claim
281 words
An inductively heatable vessel for cooking food, storing heated food and adaptable for use as a heated food serving vessel while supported on a vessel support means comprising: a first wall member forming a first container with a first cavity which is adapted for receiving food, said first wall member having an inner wall surface adjacent the first cavity and an outer wall surface, said first wall member being of a material of which no significant heating current is induced when the material of said first wall member is subjected to a changing magnetic field; inductively heatable means covering at least part of the first wall member''s outer wall surface, said inductively heatable means being of a material in which significant electrical heating current is induced when said material is subjected to a changing magnetic field; and, a second wall member forming a second container with a second cavity and having an inner wall surface and an outer wall surface, said second wall member being of a thermal insulation material in which no significant electrical heating current is induced when said material is subjected to a changing magnetic field, said first container being received in the second cavity of the second container such that the outer wall surface of the first wall member including said inductively heatable means and the inner wall surface of the second wall member enclose a space between said first and second containers, said outer wall surface of said second wall member including a portion which is adapted to contact the vessel support means whereby the second container and the first container therein may be supported in a condition of stable equilibrium on the vessel support means.
Claim 8
Dependent Claim
281 words
An inductively heatable vessel for cooking food, storing heated food and adaptable for use as a heated food serving vessel while supported on a vessel support means comprising: a first wall member forming a first container with a first cavity which is adapted for receiving food, said first wall member having an inner wall surface adjacent the first cavity and an outer wall surface, said first wall member being of a material of which no significant heating current is induced when the material of said first wall member is subjected to a changing magnetic field; inductively heatable means covering at least part of the first wall member''s outer wall surface, said inductively heatable means being of a material in which significant electrical heating current is induced when said material is subjected to a changing magnetic field; and, a second wall member forming a second container with a second cavity and having an inner wall surface and an outer wall surface, said second wall member being of a thermal insulation material in which no significant electrical heating current is induced when said material is subjected to a changing magnetic field, said first container being received in the second cavity of the second container such that the outer wall surface of the first wall member including said inductively heatable means and the inner wall surface of the second wall member enclose a space between said first and second containers, said outer wall surface of said second wall member including a portion which is adapted to contact the vessel support means whereby the second container and the first container therein may be supported in a condition of stable equilibrium on the vessel support means.
Claim 9
Dependent Claim
33 words
The vessel according to claim 6 wherein said inductively heatable means is comprised of a metallic material which is a vapor-deposited coating bonded to said outer wall suRface of the first wall member.
Claim 10
Dependent Claim
28 words
The vessel according to claim 6 wherein said inductively heatable means is a lining comprising metallic material bonded to said outer wall surface of said first wall member.
Claim 11
Dependent Claim
29 words
The vessel according to claim 6 wherein said inductively heatable means in a disposable liner comprising metallic material positionable on said outer wall surface of said first wall member.
Claim 12
Dependent Claim
23 words
The vessel according to claim 6 wherein said inductively heatable means is spatially distributed to enable a predetermined temperature profile to be achieved.
Claim 13
Dependent Claim
286 words
An inductively heatable vessel for cooking food, storing heated food and adaptable for use as a heated food serving vessel while supported on a vessel support means comprising: a first wall member forming a first container with a first cavity which is adapted for receiving food, said first wall member having an inner wall surface adjacent the first cavity and an outer wall surface, said first wall member being of a material in which no significant heating current is induced when said material of said first wall member is subjected to a changing magnetic field; inductively heatable means at least partially embedded in said first wall member in the region of said inner wall surface thereof adjacent the first cavity, said inductively heatable means being of a material in which significant electrical heating current is induced when said material is subjected to a changing magnetic field; and, a second wall member forming a second container with a second cavity and having an inner wall surface and an outer wall surface, said second wall member being of a thermal insulation material in which no significant electrical heating current is induced when said material is subjected to a changing magnetic field, said first container being received in the second cavity of the second container such that the outer wall surface of the first wall member and the inner wall surface of the second wall member enclose a space between the first and second containers, said outer wall surface of the second wall member including a portion which is adapted to contact the vessel support means whereby the second container including the first container therein may be supported in a condition of stable equilibrium on the vessel support means.
Claim 14
Dependent Claim
286 words
An inductively heatable vessel for cooking food, storing heated food and adaptable for use as a heated food serving vessel while supported on a vessel support means comprising: a first wall member forming a first container with a first cavity which is adapted for receiving food, said first wall member having an inner wall surface adjacent the first cavity and an outer wall surface, said first wall member being of a material in which no significant heating current is induced when said material of said first wall member is subjected to a changing magnetic field; inductively heatable means at least partially embedded in said first wall member in the region of said inner wall surface thereof adjacent the first cavity, said inductively heatable means being of a material in which significant electrical heating current is induced when said material is subjected to a changing magnetic field; and, a second wall member forming a second container with a second cavity and having an inner wall surface and an outer wall surface, said second wall member being of a thermal insulation material in which no significant electrical heating current is induced when said material is subjected to a changing magnetic field, said first container being received in the second cavity of the second container such that the outer wall surface of the first wall member and the inner wall surface of the second wall member enclose a space between the first and second containers, said outer wall surface of the second wall member including a portion which is adapted to contact the vessel support means whereby the second container including the first container therein may be supported in a condition of stable equilibrium on the vessel support means.
Claim 15
Dependent Claim
20 words
The vessel according to claim 11 wherein said inductively heatable means is comprised of a mass of distributed metallic particles.
Claim 16
Dependent Claim
21 words
The vessel according to claim 11 wherein said inductively heatable means is comprised of a set of concentrically arranged metallic rings.
Claim 17
Dependent Claim
19 words
The vessel according to claim 11 wherein said inductively heatable means has a relative magnetic permeability greater than unity.
Claim 18
Dependent Claim
23 words
The vessel according to claim 11 wherein said inductively heatable means is spatially distributed to enable a predetermined temperature profile to be achieved.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |