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US3806701A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric cooking utensil having a removable vessel

Assignee: Rival Manufacturing Co
•
Filing: 1972-11-03
•
Granted: 1974-04-23
•
Expires: 1992-11-03
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Abstract

Abstract An electric ceramic utensil is used to provide heat to a potentially electrically conducting foodstuff contained within the ceramic utensil. The utensil has a bottom and wall of refractive material forming a cup-shaped vessel for holding the foodstuff. The bottom and wall have a first side facing into the vessel and a second side facing externally of the vessel. The second side is unglazed and a thermal conductive, electric resistive material is combined with the second side of the wall and bottom to form an impervious coat thereon. An electric resistance heater is spiralled around the wall of the vessel to provide the heat necessary for cooking the foodstuff. A second electric resistive material is used to coat the first material and the resistance heater to provide an electrically insulated coat about the heater. A container is provided externally of the bottom and wall of the cooking utensil to support the vessel. Insulation extends between the second material and wall of the container so that the vessel may be handled while the foodstuff is being heated.

Inventors

  • 👤 R Scott

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 17:34
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/004

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 162 words
An electric ceramic utensil comprising a cup shaped vessel, said vessel being comprised of ceramic or earthenware material and having an exterior surface, a thin electric heating element, said electric heating element being wrapped and attached adjacent the exterior surface of said vessel and operable to heat said vessel and its contents when an electric current is applied thereto, a container for locating and thermally and electrically insulating said vessel and said electric heating element, electrical conductor means for applying said electric current to said electric heating element, and a first electrically non-conductive coating applied to said exterior of said vessel, said coating waterproofing said vessel and being located between said electric heating element said exterior surface, said exterior surface of said vessel having at least a portion thereof that is unglazed, said first electrically nonconducting coating having at least a portion thereof that is absorbed interiorly of said unglazed exterior surface portion of said vessel accomplishing said water-proofing of said vessel.
Claim 2
Dependent Claim 162 words
An electric ceramic utensil comprising a cup shaped vessel, said vessel being comprised of ceramic or earthenware material and having an exterior surface, a thin electric heating element, said electric heating element being wrapped and attached adjacent the exterior surface of said vessel and operable to heat said vessel and its contents when an electric current is applied thereto, a container for locating and thermally and electrically insulating said vessel and said electric heating element, electrical conductor means for applying said electric current to said electric heating element, and a first electrically non-conductive coating applied to said exterior of said vessel, said coating waterproofing said vessel and being located between said electric heating element said exterior surface, said exterior surface of said vessel having at least a portion thereof that is unglazed, said first electrically nonconducting coating having at least a portion thereof that is absorbed interiorly of said unglazed exterior surface portion of said vessel accomplishing said water-proofing of said vessel.
Claim 3
Dependent Claim 42 words
The combination as in claim 1 including a second electrically non-conducting coating, said second coating being applied to said heating element and to said first coating and operable to further electrically insulate said electric heater from the user of said electric utensil.
Claim 4
Dependent Claim 56 words
The combination as in claim 1, said vessel having an annular lip with a portion of said lip occupying a substantially horizontal plane, said thermally insulated container having a substantially flat upper peripheral edge, said upper peripheral edge operable to engage said horizontal portion of said lip and to provide a supporting surface for said vessel.

References Cited (Backward Citations)

FR903746A Cited
US2603740A Cited
US2701296A Cited
DE1023834B Cited
US2939807A Cited
CH355874A Cited
US3108170A Cited
US3177341A Cited
US3349722A Cited
US3395266A Cited
US3585357A Cited
US3646321A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-04-22 1977-10-22 1978-04-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-04-22 1981-10-22 1982-04-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-04-22 1985-10-22 1986-04-23 $7700.00 Window Closed / Lapsed

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