Patent US5324374A successfully refreshed from Google Patents.
US5324374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated glass with an electroconductive layer
Assignee: Saint Gobain Vitrage SA
•
Filing: 1992-10-02
•
Granted: 1994-06-28
•
Expires: 2012-10-02
Abstract
Abstract A laminated glazing is prepared by a providing an electroconductive layer on side 3, the sides of such a glazing being conventionally numbered from 1-4 starting from the outside of the glazing when mounted on a vehicle, towards the inside. The electroconductive layer is formed by powder deposition and pyrolysis to form a ITO layer on a glass pane, which is subsequently bent such that the surface bearing the ITO layer is convex. This glass is laminated with a glass of the same curvature, between which panes is sandwiched a plastic interlayer. On the side of the interlayer facing the electroconductive layer, current lead strips, in the form of metal tinsel, are provided, such that upon lamination, the metal lead strips are in electrical contact with the electroconductive layer and lead to a source of electricity. The resulting window is produced more simply, more reliably, and exhibits improved defogging.
Inventors
- 👤 Helene Harmand
- 👤 Jean-Francois Oudard
- 👤 Dominique Bruneel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:32
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10165; B32B17/10293; B32B17/10009; B32B17/10036; B32B17/10174; B32B17/10339; H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1271
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
218 words
A method of forming a laminated glazing, which comprises: forming an electroconductive indium tin oxide (ITO) layer by pyrolysis of a mixture of powdered indium and tin compounds on a side of a first glass sheet which is to serve as side three of said laminated glazing formed of two glass sheets and having sides 1, 2, 3 and 4 starting from the outside toward the inside of a vehicle in which the glazing is to be mounted; reducing the electroconductive ITO layer; applying a layer of enamel along the peripheries of sides 4 and 2 of said glass sheets; bending each of the two glass sheets into a shape desired for mounting on said vehicle such that side 3 of said first glass sheet is bent into a convex shape; contacting the second of said two glass sheets with said first glass sheet having said electroconductive layer thereon so that said electroconductive layer is between said glass sheets and positioning a thermoplastic sheet having electrical current leading strips fixed thereon such that upon lamination in the next step, the leading strips come into contact with said electroconductive layer on the edges of said first glass sheet, between said glass sheets; and laminating the combined glass sheets under heat and pressure to prepare a glazing for said vehicle.
Claim 2
Independent Claim
218 words
A method of forming a laminated glazing, which comprises: forming an electroconductive indium tin oxide (ITO) layer by pyrolysis of a mixture of powdered indium and tin compounds on a side of a first glass sheet which is to serve as side three of said laminated glazing formed of two glass sheets and having sides 1, 2, 3 and 4 starting from the outside toward the inside of a vehicle in which the glazing is to be mounted; reducing the electroconductive ITO layer; applying a layer of enamel along the peripheries of sides 4 and 2 of said glass sheets; bending each of the two glass sheets into a shape desired for mounting on said vehicle such that side 3 of said first glass sheet is bent into a convex shape; contacting the second of said two glass sheets with said first glass sheet having said electroconductive layer thereon so that said electroconductive layer is between said glass sheets and positioning a thermoplastic sheet having electrical current leading strips fixed thereon such that upon lamination in the next step, the leading strips come into contact with said electroconductive layer on the edges of said first glass sheet, between said glass sheets; and laminating the combined glass sheets under heat and pressure to prepare a glazing for said vehicle.
Claim 3
Dependent Claim
34 words
The method of claim 1, wherein the pyrolized layer, upon bending of the laminated glass sheet has a homogenous thickness over the entire surface thereby exhibiting a homogenous electrical resistance over its entire surface.
Claim 4
Dependent Claim
24 words
The method of claim 1, wherein said electrical current leading strips are positioned on said electroconductive layer prior to lamination of the glass sheets.
Claim 5
Dependent Claim
26 words
The method of claim 1, which comprises applying the electroconductive layer of indium-tin oxide to a minimum thickness of about 180 nm on said glass sheet.
Claim 6
Dependent Claim
23 words
The method of claim 1, wherein said mixture of indium and tin compounds is a mixture of indium formate and dibutyl tin oxide.
Claim 7
Dependent Claim
24 words
The method of claim 1, wherein said second glass sheet is tinted to a greenish color by cobalt oxide, iron oxide or combinations thereof.
References Cited (Backward Citations)
US2648754A
Cited
US4073986A
Cited
US3974359A
Cited
US4057671A
Cited
US4078107A
Cited
US4278875A
Cited
US4583815A
Cited
EP0108616A1
Cited
US4490227A
Cited
US4644139A
Cited
US4859499A
Cited
US4655811A
Cited
US4654067A
Cited
US4744844A
Cited
EP0274914A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-27 | 1997-12-27 | 1998-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-27 | 2001-12-27 | 2002-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-27 | 2005-12-27 | 2006-06-28 | $7700.00 | Window Closed / Lapsed |