US3889026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-reflecting pane
Assignee: BFG Glassgroup GIE
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Filing: 1973-11-05
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Granted: 1975-06-10
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Expires: 1993-11-05
Abstract
Abstract A heat-reflecting pane comprises a sheet of transparent material having a coating in the form of a light-transmitting silver layer applied over a dielectric layer, the dielectric layer being absorption-free for visible light and having a refractive index greater than 2. The thickness of the silver layer is between 140 and 240 A, preferably between 160 and 220 A, and the thickness of the dielectric layer is between 400 and 600 A, preferably between 440 and 560 A. In one particular embodiment, the silver layer has a thickness of 190 A and the dielectric layer is a zinc sulphide layer having a thickness of 500 A. The heat-reflecting pane may be connected to another pane by an adhesive layer to form a safety glazing laminate having heat-reflecting properties, or may be supported in spaced apart relationship to another pane to form a double-glazing unit in which the coated surface of the heatreflecting pane is adjacent the gap between the panes.
Inventors
- 👤 Rolf Groth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:25
CPC Classifications
B; B65; B65G; B65G51/00; B65G51/02; B65G51/03; C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3607; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10045; B32B17/10165; B32B17/10174; C03C17/3628; C03C17/3644; C03C17/3657; C03C17/366; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
HEAT-REFLECTING PANE CONSISTING ESSENTIALLY OF A TRANSPARENT LAYER SUPPORT, LIGHT-TRANSMITTING SILVER LAYER APPLIED THE TRANSPARENT LAYER SUPPORT, AND A DIELECTRIC LAYER SELECTED FROM THE GROUP CONSISTING OF ZINC SULFIDE, CERIUM DIOXIDE, TITANIUM OXIDE AND BISMUTH OXIDE THAT IS ABSORPTION-FREE OR AT LEAST OF LOW ABSORPTION FOR VISIBLE LIGHT, DISPOSED BETWEEN THE LAYER SUPPORT AND THE SILVER LAYER AND HAVING A REFLECTIVE INDEX GREATER THAN 2, CHARACTERIZED IN THAT, FOR THE ACHIEVEMENT OF COLOR NEUTRALITY BOTH UPON VIEWING FROM THE INSIDE AND UPON VIEWING FROM THE OUTSIDE, THE THICKNESS OF THE SILVER LAYER IS BETWEEN 140 AND 240 A AND THE THICKNESS OF THE DIELECTRIC LAYER IS BETWEEN 400 AND 600 A.
Claim 2
Dependent Claim
111 words
HEAT-REFLECTING PANE CONSISTING ESSENTIALLY OF A TRANSPARENT LAYER SUPPORT, LIGHT-TRANSMITTING SILVER LAYER APPLIED THE TRANSPARENT LAYER SUPPORT, AND A DIELECTRIC LAYER SELECTED FROM THE GROUP CONSISTING OF ZINC SULFIDE, CERIUM DIOXIDE, TITANIUM OXIDE AND BISMUTH OXIDE THAT IS ABSORPTION-FREE OR AT LEAST OF LOW ABSORPTION FOR VISIBLE LIGHT, DISPOSED BETWEEN THE LAYER SUPPORT AND THE SILVER LAYER AND HAVING A REFLECTIVE INDEX GREATER THAN 2, CHARACTERIZED IN THAT, FOR THE ACHIEVEMENT OF COLOR NEUTRALITY BOTH UPON VIEWING FROM THE INSIDE AND UPON VIEWING FROM THE OUTSIDE, THE THICKNESS OF THE SILVER LAYER IS BETWEEN 140 AND 240 A AND THE THICKNESS OF THE DIELECTRIC LAYER IS BETWEEN 400 AND 600 A.
Claim 3
Dependent Claim
20 words
Heat-reflecting pane of claim 1, characterized in that the thickness of the silver layer is between 160 and 220 A.
Claim 4
Dependent Claim
20 words
Heat-reflecting pane of claim 1, characterized in that the thickness of the dielectric layer is between 440 and 560 A.
Claim 5
Dependent Claim
33 words
Heat-reflecting pane of claim 1, characterized in that the silver layer has a thickness of 190 A and zinc sulfide is used as the dielectric layer and has a thickness of 500 A.
Claim 6
Dependent Claim
25 words
Heat-reflecting pane of claim 1, characterized in that the silver layer is provided on the side averted from the dielectric layer with a protective layer.
Claim 7
Dependent Claim
16 words
Heat-reflecting pane of claim 5, characterized in that the protective layer consists of a transparent lacquer.
Claim 8
Dependent Claim
38 words
A SAFETY LAMINATE PANE COMPRISING AT LEAST TWO PNES JOINED BY AN ADHESIVE INTERLAYER, OF WHICH AT LEAST ONE IS THE HEAT-REFLECTING PANE OF CLAIM 1 AND IS SO DISPOSED THAT THE SILVER LAYER FACES THE ADHESIVE INTERLAYER.
Claim 9
Dependent Claim
12 words
A safety laminate pane of claim 7, the panes being glass panes.
Claim 10
Dependent Claim
15 words
A safety laminate pane of claim 7, wherein at least one pane consists of plastic.
Claim 11
Dependent Claim
33 words
A DOUBLE-GLAZING UNIT COMPRISING AT LEAST TWO PANES IN SPACED APART RELATIONSHIP, OF WHICH AT LEAST ONE IS THE HEATREFLECTING PANE OF CLAIM 1 WHOSE COATED SIDE FACES THE GAP BETWEEN THE PANES.
Claim 12
Dependent Claim
35 words
A double-glazing unit of claim 10 wherein at least one of the panes being a laminated safety pane and having at least one pane bearing the said heat-reflecting coating on the side facing said gap.
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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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |