US3710074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated multiple glazed window having an iridescence masking film
Assignee: PPG Industries Inc
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Filing: 1970-10-08
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Granted: 1973-01-09
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Expires: 1990-10-08
Abstract
Abstract A multiple glazed window unit having an electro-conductive coating and bus bars on the enclosed space surface of one of its glass panels is used to reduce condensation, drafts, and room heat loss adjacent to the window when the outside temperature is below that inside. A selective reflecting film on the enclosed space surface of one of the panels improves the heat insulating character of the unit and reduces visible iridescence common to electroconductive films. The selective reflecting film has an absolute infrared reflectance of at least 0.7 and sufficient visible light reflectance for the substantial elimination of visible iridescence.
Inventors
- 👤 J Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:18
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10045; B32B17/10055; B32B17/10165; B32B17/10174; E; E06; E06B; E06B3/00; E06B3/66; E06B3/67; E06B3/6715; H; H05; H05B; H05B3/00; H05B3/84; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
A multiple glazed window unit for separating a thermally controlled space from an environment comprising two transparent panels disposed in parallel relation to one another, designated as a first panel for facing said controlled space and a second panel for facing said environment, spacing means marginally disposed between the panels separating one from another and sealing means disposed around the panel edges forming a hermetically sealed enclosed space therebetween, a transparent electroconductive coating on the enclosed space surface of said first panel and electrical source means connected thereto and a transparent, light and heat reflecting coating having an absolute infrared reflectance of at least 0.7 on the enclosed space surface of said second panel, said light and heat reflecting coating having sufficient visible light reflectance to substantially eliminate apparent iridescence observable from said electroconductive coating.
Claim 2
Dependent Claim
135 words
A multiple glazed window unit for separating a thermally controlled space from an environment comprising two transparent panels disposed in parallel relation to one another, designated as a first panel for facing said controlled space and a second panel for facing said environment, spacing means marginally disposed between the panels separating one from another and sealing means disposed around the panel edges forming a hermetically sealed enclosed space therebetween, a transparent electroconductive coating on the enclosed space surface of said first panel and electrical source means connected thereto and a transparent, light and heat reflecting coating having an absolute infrared reflectance of at least 0.7 on the enclosed space surface of said second panel, said light and heat reflecting coating having sufficient visible light reflectance to substantially eliminate apparent iridescence observable from said electroconductive coating.
Claim 3
Dependent Claim
48 words
The multiple glazed window unit of claim 1 wherein said electroconductive coating comprises a transparent metal oxide film and said transparent light and heat reflecting coating has an emissivity less than 0.9 overall and less than about 0.6 for wavelengths between 800 millimicron units and 2250 millimicron units.
Claim 4
Dependent Claim
46 words
The multiple glazed window unit of claim 1 wherein said electroconductive coating comprises a transparent metal oxide film and said transparent light and heat reflecting coating comprises a metallic coating selected from a group consisting of platinum, palladium, copper, chrome, nickel, gold, aluminum, titanium and silver.
Claim 5
Dependent Claim
25 words
The multiple glazed window unit of claim 3 wherein said electroconductive coating comprises tin oxide and said transparent light and heat reflecting coating comprises copper.
Claim 6
Dependent Claim
13 words
The multiple glazed window unit of claim 4 wherein the panels are glass.
Claim 7
Dependent Claim
122 words
A building having a wall opening in which is mounted a window unit comprising two transparent panels disposed in parallel relation to one another, spacing means marginally disposed between said panels spacing them apart from one another, sealing means disposed around the edges of said panels forming a hermetically sealed enclosed space therebetween, a transparent electroconductive coating disposed on the enclosed space surface of the panel adjacent the building interior and electrical source means connected thereto and a mEtallic, transparent, light and heat reflecting coating having an absolute infrared reflectance of at least 0.7 and sufficient visible light reflectance to mask the iridescence of said electroconductive coating disposed on the enclosed space surface of the panel facing the exterior of the building.
Claim 8
Dependent Claim
122 words
A building having a wall opening in which is mounted a window unit comprising two transparent panels disposed in parallel relation to one another, spacing means marginally disposed between said panels spacing them apart from one another, sealing means disposed around the edges of said panels forming a hermetically sealed enclosed space therebetween, a transparent electroconductive coating disposed on the enclosed space surface of the panel adjacent the building interior and electrical source means connected thereto and a mEtallic, transparent, light and heat reflecting coating having an absolute infrared reflectance of at least 0.7 and sufficient visible light reflectance to mask the iridescence of said electroconductive coating disposed on the enclosed space surface of the panel facing the exterior of the building.
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |