US5296302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion-resistant overcoat for coated substrates
Assignee: Cardinal CG Co
•
Filing: 1992-03-27
•
Granted: 1994-03-22
•
Expires: 2012-03-27
Abstract
Abstract The present invention provides a high transmittance, low emissivity film stack having an overcoat of an oxide of a metal chosen from the group of zinc, tin, indium, or bismuth, or an alloy including one or more of these metals, the oxide being applied in a thickness sufficiently low as to have no significant affect upon the optical properties of the coated substrate. That is, if the overcoat is lost through abrasion or chemical attack, the loss will not significantly affect the optical properties of the coating. The resulting film stack exhibits significantly enhanced durability as compared to a film stack without such an overcoat. In a preferred embodiment, a film stack of the invention includes at least one reflective metal layer, an outer, scratch-resistant metal oxide overcoat, and a metal oxide layer between the silver layer and the overcoat which is less scratch resistant than the overcoat.
Inventors
- 👤 Roger O'Shaughnessy
- 👤 Robert Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:09
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3618; B; B32; B32B; B32B17/00; B32B17/06; C03C17/3642; C03C17/3657; C03C17/366; C03C17/3681; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/086; C23C14/14; C23C14/18; C23C14/185; G02B1/105; G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115; G02B1/116; G02B1/14; C03C2217/00; C03C2217/70; C03C2217/78; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
83 words
A film stack applied on a substrate comprising a first metal oxide layer, at least one reflective metal layer, a second metal oxide layer disposed away from said first metal oxide layer, and an abrasion-resistant overcoat defining the outermost layer of the film stack, the overcoat being formed of an oxide of a metal selected from the group consisting of zinc, tin, indium, bismuth, and alloys thereof applied at a thickness which does not substantially affect the optical properties of said film stack.
Claim 2
Dependent Claim
83 words
A film stack applied on a substrate comprising a first metal oxide layer, at least one reflective metal layer, a second metal oxide layer disposed away from said first metal oxide layer, and an abrasion-resistant overcoat defining the outermost layer of the film stack, the overcoat being formed of an oxide of a metal selected from the group consisting of zinc, tin, indium, bismuth, and alloys thereof applied at a thickness which does not substantially affect the optical properties of said film stack.
Claim 3
Dependent Claim
12 words
The film stack of claim 1 wherein said overcoat is zinc oxide.
Claim 4
Dependent Claim
26 words
The film stack of claim 1 wherein said overcoat comprises an oxide of a metal chosen from the group consisting of zinc, tin, indium, and bismuth.
Claim 5
Dependent Claim
28 words
The film stack of claim 1 wherein said metal oxide of said overcoat is applied at an optical thickness of between about 10 A and about 40 A.
Claim 6
Dependent Claim
17 words
The film stack of claim 1 wherein the second metal oxide layer comprises an oxide of titanium.
Claim 7
Dependent Claim
24 words
The film stack of claim 2 wherein said zinc oxide is applied at a thickness of between about 5 A and about 20 A.
Claim 8
Dependent Claim
100 words
A coated substrate comprising a substantially transparent substrate, a reflective metal layer, a first metal oxide layer disposed between the substrate and the metal layer, a second metal oxide layer applied over the metal layer at a location disposed away from the substrate, and an abrasion-resistant overcoat defining the outermost layer of the film stack, the overcoat being formed of an oxide of a metal selected from the group consisting of zinc, tin, indium, bismuth, and an alloy of zinc, tin, indium or bismuth applied at a thickness which does not substantially affect the optical properties of said coated substrate.
Claim 9
Dependent Claim
100 words
A coated substrate comprising a substantially transparent substrate, a reflective metal layer, a first metal oxide layer disposed between the substrate and the metal layer, a second metal oxide layer applied over the metal layer at a location disposed away from the substrate, and an abrasion-resistant overcoat defining the outermost layer of the film stack, the overcoat being formed of an oxide of a metal selected from the group consisting of zinc, tin, indium, bismuth, and an alloy of zinc, tin, indium or bismuth applied at a thickness which does not substantially affect the optical properties of said coated substrate.
Claim 10
Dependent Claim
11 words
The coated substrate of claim 1 wherein said substrate is glass.
Claim 11
Dependent Claim
33 words
The coated substrate of claim 7 wherein said overcoat comprises an oxide of a metal chosen from the group of zinc, tin, indium, bismuth or an alloy of zinc, tin, indium or bismuth.
Claim 12
Dependent Claim
25 words
The coated substrate of claim 9 wherein said metal oxide is applied at an optical thickness of between about 10 A and about 40 A.
Claim 13
Dependent Claim
20 words
The coated substrate of claim 7 wherein said overcoat comprises an oxide of zinc or of an alloy including zinc.
Claim 14
Dependent Claim
12 words
The coated substrate of claim 1 wherein said overcoat comprises zinc oxide.
Claim 15
Dependent Claim
24 words
The coated substrate of claim 12 wherein said zinc oxide is applied at a thickness of between about 5 A and about 20 A.
References Cited (Backward Citations)
GB1270586A
Cited
USRE27473E
Cited
US3758185A
Cited
US3889026A
Cited
US3978272A
Cited
US4045125A
Cited
US4179181A
Cited
US4532181A
Cited
US4639069A
Cited
US4462883A
Cited
US4497700A
Cited
US4594137A
Cited
EP0183052A2
Cited
US4891113A
Cited
US4902581A
Cited
US4716086A
Cited
US4786563A
Cited
US4799745B1
Cited
US4799745A
Cited
US4898790A
Cited
GB2201428A
Cited
US4902081A
Cited
US4790922A
Cited
EP0304234A2
Cited
US4902580A
Cited
US5028759A
Cited
US4898789A
Cited
WO1990005439A1
Cited
US5073451A
Cited
US4960310A
Cited
US5073450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |