Patent US3664013A successfully refreshed from Google Patents.
US3664013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing electric heating panels
Assignee: Individual
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Filing: 1970-03-06
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Granted: 1972-05-23
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Expires: 1990-03-06
Abstract
Abstract An electric heating panel is composed of two cakes compressed into a homogeneous unitary body of a thermosetting polymerizable resin having an inert filler with an intermediate asbestos sheet having an electric heating circuit lying wholly against one surface of said sheet, the method of manufacturing said panel consisting of impaling the sheet upon a set of spaced upstanding prongs around which the wire of said circuit is next bent, temporarily securing said wire in the pattern so formed, disimpaling said sheet and circuit, and uniting said cakes with said sheet and circuit therebetween under heat and pressure, the said cakes having a moisture content of between 8 and 12 percent by weight after drying, the panel being aluminum or gold painted on one surface if it is desired only to reflect heat from the other surface.
Inventors
- 👤 Andrew Edward Macguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:30
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/28; H05B3/286; F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; H05B3/283; Y; Y02; Y02B; Y02B30/00; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083; Y10T29/49087
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
241 words
In the construction of electric heating panels and the like the method which consists of the steps of impaling a sheet of asbestos or the like upon a set of spaced and pointed guide prongs projecting from a supporting surface therebelow, forming a wire electric heating pattern upon said sheet by stretching said wire between said prongs and bending it therearound, securing said electric heating pattern against movement on said asbestos sheet, disimpaling said sheet and pattern from said prongs and effecting a relative transfer of said sheet and pattern as between said supporting surface and a first cake of a suitable material so that said sheet and pattern is supported on said first cake, placing a second cake of suitable material upon said first cake so that said asbestos sheet and electric heating pattern is sandwiched between said cakes, and said cakes being forced together under pressure to effect the union thereof, a heat radiating surface pattern being impressed upon the outer surface of at least one of said cakes during the application of said pressure, said heat radiating pattern consisting of alternating recessed and relatively projecting areas, the troughs of said recessed areas immediately overlying the wire of said electric heating pattern so as to provide greater material density and heat dispersion with diminished thickness where they so overlie, said projecting areas providing a protecting surface of reduced density and increased thickness against foreign contact with said recessed areas.
Claim 2
Dependent Claim
241 words
In the construction of electric heating panels and the like the method which consists of the steps of impaling a sheet of asbestos or the like upon a set of spaced and pointed guide prongs projecting from a supporting surface therebelow, forming a wire electric heating pattern upon said sheet by stretching said wire between said prongs and bending it therearound, securing said electric heating pattern against movement on said asbestos sheet, disimpaling said sheet and pattern from said prongs and effecting a relative transfer of said sheet and pattern as between said supporting surface and a first cake of a suitable material so that said sheet and pattern is supported on said first cake, placing a second cake of suitable material upon said first cake so that said asbestos sheet and electric heating pattern is sandwiched between said cakes, and said cakes being forced together under pressure to effect the union thereof, a heat radiating surface pattern being impressed upon the outer surface of at least one of said cakes during the application of said pressure, said heat radiating pattern consisting of alternating recessed and relatively projecting areas, the troughs of said recessed areas immediately overlying the wire of said electric heating pattern so as to provide greater material density and heat dispersion with diminished thickness where they so overlie, said projecting areas providing a protecting surface of reduced density and increased thickness against foreign contact with said recessed areas.
Claim 3
Dependent Claim
156 words
In the construction of electric heating panels and the like, the method which consists of the steps of placing upon a first cake of a suitable material an electric heating pattern, then placing a second cake of suitable material upon the said first cake and said pattern so that said pattern is sandwiched between said cakes and forcing said cakes together under pressure to effect the union thereof, a heat radiating surface pattern being impressed upon the outer surface of at least one of said cakes during the application of said pressure, said heat radiating pattern consisting of alternating recessed and relatively projecting areas, the troughs of said recessed areas immediately overlying the wire of said electric heating pattern so as to provide greater material density and heat dispersion with diminished thickness where they so overlie, said projecting areas providing a protecting surface of reduced density and increased thickness against foreign contact with said recessed areas.
Claim 4
Dependent Claim
156 words
In the construction of electric heating panels and the like, the method which consists of the steps of placing upon a first cake of a suitable material an electric heating pattern, then placing a second cake of suitable material upon the said first cake and said pattern so that said pattern is sandwiched between said cakes and forcing said cakes together under pressure to effect the union thereof, a heat radiating surface pattern being impressed upon the outer surface of at least one of said cakes during the application of said pressure, said heat radiating pattern consisting of alternating recessed and relatively projecting areas, the troughs of said recessed areas immediately overlying the wire of said electric heating pattern so as to provide greater material density and heat dispersion with diminished thickness where they so overlie, said projecting areas providing a protecting surface of reduced density and increased thickness against foreign contact with said recessed areas.
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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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |