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US4902081A Expired / Lapsed US ⏱️ 0.0 years remaining

Low emissivity, low shading coefficient low reflectance window

Assignee: WSA Inc A CORP OF WI
•
Filing: 1987-05-22
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Granted: 1990-02-20
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Expires: 2007-05-22
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Abstract

Abstract A low emissivity, low shading coefficient, low reflectance window consisting of two panes of glass. The first pane having a low wave infrared reflecting and a visible light and short wave infrared absorbing section of coatings on its inside surface. A second pane spaced about one half inch from the inside surface of the first pane to protect the coatings on the first pane and to insulate the room form the heat generated on the light and heat absorbing coating of the first pane. The infrared reflecting section consisting of four layers of metals and metal oxides. The first layer of metal oxides selected from the group consisting of tin oxide, zinc oxide and a combination of zinc and tin oxide. The second layer is silver. The third layer consisting of a metal selected from the group consisting of aluminum, titanium, zinc and tin. The fourth layer selected from the same group as the first layer. The visible light and short wave infrared absorbing section consists of a coating of titanium nitride.

Inventors

  • 👤 Russell Huffer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 05:03
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/66; E06B3/67; E06B3/6715; C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3618; C03C17/3626; C03C17/3644; C03C17/3652; C03C17/3657; C03C17/366; C03C17/3681; G; G02; G02B; G02B5/00; G02B5/08; G02B5/0816; G02B5/085; G02B5/0858; G02B5/20; G02B5/208

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 155 words
A low emissivity, low shading coefficient, low reflectance window consisting of an outside pane of glass having an inside surface and an outside surface, and an inside pane of glass having an inside surface and an outside surface, the outside pane of glass having a space between it and the inside pane of glass, the inside surface of the outside pane of glass having an infrared reflecting coating having a plurality of layers of metal and metal oxides forming a low emissivity coating on the glass, to reflect long wave infrared radiation and transmit visible radiation and short wave infrared radiation, a visible light absorbing coating on the infrared reflecting coating having a metal nitride layer to absorb the visible light energy and short wave infrared energy and convert it to heat energy which is conducted through the low emissivity coating to the outside pane, where said heat energy can be conducted and radiated away.
Claim 2
Dependent Claim 155 words
A low emissivity, low shading coefficient, low reflectance window consisting of an outside pane of glass having an inside surface and an outside surface, and an inside pane of glass having an inside surface and an outside surface, the outside pane of glass having a space between it and the inside pane of glass, the inside surface of the outside pane of glass having an infrared reflecting coating having a plurality of layers of metal and metal oxides forming a low emissivity coating on the glass, to reflect long wave infrared radiation and transmit visible radiation and short wave infrared radiation, a visible light absorbing coating on the infrared reflecting coating having a metal nitride layer to absorb the visible light energy and short wave infrared energy and convert it to heat energy which is conducted through the low emissivity coating to the outside pane, where said heat energy can be conducted and radiated away.
Claim 3
Dependent Claim 96 words
A low emissivity, low shading coefficient, low reflectance window as in claim 1 where the low emissivity coating consists of a first layer of metal oxides selected from the group consisting of tin oxide, zinc oxide and a combination of zinc and tin oxide, applied to the glass, a second layer of silver, a third layer of consisting of a metal selected from the group consisting of aluminum, titanium, zinc and tin, a fourth layer of metal oxides selected from the group consisting of tin oxide, zinc oxide and a combination of zinc and tin oxide.
Claim 4
Dependent Claim 25 words
A low emissivity, low shading coefficient, low reflectance window as in claim 2 where the visible light absorbing coating is a layer of titanium nitride.
Claim 5
Dependent Claim 34 words
A low emissivity, low shading coefficient, low reflectance window as in claim 3 where the inside and outside panes of glass are annealed or heat treated glass and spaced approximately one half inch apart.

References Cited (Backward Citations)

US4098956A Cited
US4180954A Cited
US4462883A Cited
US4515151A Cited
US4548691A Cited
US4497700A Cited
US4610771A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-02-19 1993-08-21 1994-02-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-02-19 1997-08-21 1998-02-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-02-19 2001-08-21 2002-02-20 $7700.00 Window Closed / Lapsed

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