Patent US3795427A successfully refreshed from Google Patents.
US3798415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated cooking utensil
Assignee: GRAHAM CORP M
•
Filing: 1972-08-25
•
Granted: 1974-03-19
•
Expires: 1992-08-25
Abstract
Abstract A cooking utensil having a cooking vessel of heat conductive metal and an electrical heating element is attached to said cooking vessel by a holding means formed of heat conducting metal. The heating element is pressed fit into a recess of the holding means, and the holding means is attached to the cooking vessel by fasteners. The holding means is in heat conducting relationship with a substantial area of the cooking vessel and has a thickness which diminishes progressively toward the center of the cooking vessel to shorten the time required to bring the central portion of the cooking vessel to the desired temperature.
Inventors
- 👤 E Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:02
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/10; A47J37/105
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
An immersible electrically heated cooking utensil having a removable and replaceable heating element, comprising, a cooking vessel of heat conductive metal for supporting the material to be cooked, an electrical heating element below the cooking vessel, said heating element having an electrical resistance heating element enclosed within a body of electrical insulating material, holding means for attaching the heating element to the cooking vessel, said holding means including a body of heat conducting metal having a recess receiving the heating element, sealant means for preventing the seepage of water into the interface between the cooking vessel and the holding means, and removable fastener means for attaching the holding means to the undersurface of the cooking vessel.
Claim 2
Dependent Claim
116 words
An immersible electrically heated cooking utensil having a removable and replaceable heating element, comprising, a cooking vessel of heat conductive metal for supporting the material to be cooked, an electrical heating element below the cooking vessel, said heating element having an electrical resistance heating element enclosed within a body of electrical insulating material, holding means for attaching the heating element to the cooking vessel, said holding means including a body of heat conducting metal having a recess receiving the heating element, sealant means for preventing the seepage of water into the interface between the cooking vessel and the holding means, and removable fastener means for attaching the holding means to the undersurface of the cooking vessel.
Claim 3
Dependent Claim
15 words
The utensil of claim 1 wherein the holding means is a body of cast aluminum.
Claim 4
Dependent Claim
24 words
The utensil of claim 1 wherein the holding means has a laterally oriented aperture for receiving a temperature-sensing probe of a thermostatic control unit.
Claim 5
Dependent Claim
24 words
The utensil of claim 1 wherein the cooking vessel is formed of a composite materiaL formed of an aluminum core clad with stainless steel.
Claim 6
Dependent Claim
19 words
The utensil of claim 1 wherein the thickness of the cooking vessel is no greater than about 0.150 inch.
Claim 7
Dependent Claim
24 words
The utensil of claim 1 wherein the fastener means includes studs which project through the holding means and are welded to the cooking vessel.
Claim 8
Dependent Claim
28 words
The utensil of claim 1 wherein the coefficient of thermal conductivity of the material forming the holding means is at least about 0.4 cal. cm./sec. cm.2 C.* .
Claim 9
Dependent Claim
30 words
The utensil of claim 1 wherein the holding means extends radially inwardly from the recess to conduct heat from the heating element to the central portion of the cooking vessel.
Claim 10
Dependent Claim
49 words
The utensil of claim 9 wherein the upper surface of the holding means conforms to the cooking vessel and the thickness of the holding means diminishes progressively toward the central portion of the cooking vessel to shorten the time required to bring said central portion to the desired temperature.
Claim 11
Dependent Claim
25 words
The utensil of claim 1 wherein the fastener means includes a threaded fastener for attaching the holding means to the undersurface of the cooking vessel.
Claim 12
Dependent Claim
24 words
The utensil of claim 1 wherein the holding means and the heating element are in direct contact with the undersurface of the cooking vessel.
References Cited (Backward Citations)
US1238808A
Cited
US2458251A
Cited
GB648211A
Cited
US3010006A
Cited
US3095498A
Cited
US2880301A
Cited
US2908073A
Cited
US3017492A
Cited
US3064112A
Cited
US3097289A
Cited
US3110796A
Cited
US3445630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |