US3866018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded plastic cooktop with heated glass-ceramic plate insert
Assignee: General Electric Co
•
Filing: 1974-04-01
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Granted: 1975-02-11
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Expires: 1994-04-01
Abstract
Abstract A heated cooktop having a high temperature plastic housing of shallow box-like configuration with a large opening in the top wall in which is mounted a heated glass-ceramic plate. The bottom portion of the housing includes a rigid plate supporting a plurality of electric or gas surface heating means in thermal relationship with the underside of the glass-ceramic plate.
Inventors
- 👤 Bohdan Hurko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:51
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/74; F; F24; F24C; F24C7/00; F24C7/06; F24C7/067
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A HEATED COOKTOP COMPRISING A GLASS-CERAMIC PLATE THAT IS FURNISHED WITH AT LEAST ONE ELECTRIC SURFACE HEATING MEANS, A SUPPORT MEANS FOR THE GLASS-CERAMIC PLATE IN THE FORM OF A HOUSING OF POLYMERIC RESINOUS MATERIAL OF THIN STOCK, THE SAID HOUSING HAVING A TOP OPENING IN WHICH THE GLASS-CERAMIC PLATE IS INSERTED AS A FLUSH MOUNT TO FORM AN INTEGRAL PART OF THE HOUSING, THE SAID HOUSING BEING OF SHALLOW BOX-LIKE CONFIGURATION HAVING A TOP SURFACE, A PLUTALITY OF SHALLOW VERTICAL SIDE WALLS EXTENDING DOWNWARDLY THEREFROM, THE SURFACE HEATING MEANS HAVING SUPPORT MEANS THAT INCLUDE A RIGID PLATE POSITIONED ADJACENT THE BOTTOM OF THE HOUSING AND ATTACHED TO CERTAIN OF SAID SIDE WALLS, WHEREBY THE HOUSING CREATES A LARGE TEMPERATURE DROP FROM THE EDGE OF THE GLASS-CERAMIC THE OUTER EDGE OF THE COOKTOP.
Claim 2
Dependent Claim
133 words
A HEATED COOKTOP COMPRISING A GLASS-CERAMIC PLATE THAT IS FURNISHED WITH AT LEAST ONE ELECTRIC SURFACE HEATING MEANS, A SUPPORT MEANS FOR THE GLASS-CERAMIC PLATE IN THE FORM OF A HOUSING OF POLYMERIC RESINOUS MATERIAL OF THIN STOCK, THE SAID HOUSING HAVING A TOP OPENING IN WHICH THE GLASS-CERAMIC PLATE IS INSERTED AS A FLUSH MOUNT TO FORM AN INTEGRAL PART OF THE HOUSING, THE SAID HOUSING BEING OF SHALLOW BOX-LIKE CONFIGURATION HAVING A TOP SURFACE, A PLUTALITY OF SHALLOW VERTICAL SIDE WALLS EXTENDING DOWNWARDLY THEREFROM, THE SURFACE HEATING MEANS HAVING SUPPORT MEANS THAT INCLUDE A RIGID PLATE POSITIONED ADJACENT THE BOTTOM OF THE HOUSING AND ATTACHED TO CERTAIN OF SAID SIDE WALLS, WHEREBY THE HOUSING CREATES A LARGE TEMPERATURE DROP FROM THE EDGE OF THE GLASS-CERAMIC THE OUTER EDGE OF THE COOKTOP.
Claim 3
Dependent Claim
36 words
A heated cooktop as recited in claim 1 wherein the high temperature plastic housing is molded of materials from the class comprising polyethersulfone, polyphenylene sulfide, and polyester with fiber glass fillers and a urethane surface coating.
Claim 4
Dependent Claim
110 words
A heated cooktop as recited in claim 1, wherein the said top opening is provided with a recessed ledge surrounding the opening and on which the glass-ceramic plate is seated and bonded so that the top surface of the glass-ceramic plate will be substantially flush with the top surface of the top wall of the plastic cooktop with a minimum clearance gap left between the peripheral side of the glass-ceramic plate and the vertical sides of the recessed ledge so as to accommodate the mismatch of the coefficients of thermal expansion of the glass-ceramic plate and the plastic cooktop and prevent the buckling of the materials under high temperature conditions.
Claim 5
Dependent Claim
46 words
A heated cooktop as recited in claim 3 wherein the said high temperature plastic housing is an injection molded part, and the glass-ceramic plate is bonded in place with a high temperature adhesive material such as silicone or the like filling the said minimum clearance gap.
Claim 6
Dependent Claim
20 words
A heated cooktop as recited in claim 4 wherein the said high temperature plastic material is preferably a polyethersulfone material.
References Cited (Backward Citations)
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Cited
US3627986A
Cited
US3591753A
Cited
US3632983A
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US3636309A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |