US5480722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet ray absorbent glass and method for preparing the same
Assignee: AGC Inc
•
Filing: 1993-06-30
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Granted: 1996-01-02
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Expires: 2013-06-30
Abstract
Abstract A ultraviolet ray absorbent glass comprises a substrate glass, a ultraviolet ray absorbent film including as the major component at least one selected from the group consisting of zinc oxide, titanium oxide and cerium oxide, and an intermediate film having an intermediate refractive index which is between the refractive indices of the ultraviolet absorbent film and the substrate glass, the intermediate film being located between the ultraviolet absorbent film and the substrate glass, whereby iridescence by the ultraviolet ray absorbent film is reduced, and a heat reflecting function is imparted.
Inventors
- 👤 Hiroyuki Tomonaga
- 👤 Takeshi Morimoto
- 👤 Kazuya Hiratsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:03
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3417; C03C2217/00; C03C2217/70; C03C2217/72; C03C2217/74; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/113; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24926; Y10T428/26; Y10T428/261; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
An ultraviolet ray absorbent glass which comprises: a substrate glass, an ultraviolet ray absorbent film having a thickness of 100-800 nm comprising at least two members selected from the group consisting of zinc oxide, titanium oxide and cerium oxide, and a transparent metal oxide intermediate film comprising at least two components selected from the group consisting of silicon oxide, germanium oxide, aluminum oxide, zirconium oxide, titanium oxide, tin oxide, indium oxide, tantalum oxide, zinc oxide and cerium oxide, provided that at least one component is selected from the group consisting of zing oxide, titanium oxide and cerium oxide, having refractive index which is between the refractive indices of the ultraviolet ray absorbent film and the substrate glass, the intermediate film having an optical film thickness of λ/4±10% as large as the wavelength of visible light of 400-700 nm, said intermediate film being located between the ultraviolet ray absorbent film and the substrate glass, whereby iridescence by the ultraviolet ray absorbent film is reduced, and a heat reflecting function is imparted.
Claim 2
Dependent Claim
170 words
An ultraviolet ray absorbent glass which comprises: a substrate glass, an ultraviolet ray absorbent film having a thickness of 100-800 nm comprising at least two members selected from the group consisting of zinc oxide, titanium oxide and cerium oxide, and a transparent metal oxide intermediate film comprising at least two components selected from the group consisting of silicon oxide, germanium oxide, aluminum oxide, zirconium oxide, titanium oxide, tin oxide, indium oxide, tantalum oxide, zinc oxide and cerium oxide, provided that at least one component is selected from the group consisting of zing oxide, titanium oxide and cerium oxide, having refractive index which is between the refractive indices of the ultraviolet ray absorbent film and the substrate glass, the intermediate film having an optical film thickness of λ/4±10% as large as the wavelength of visible light of 400-700 nm, said intermediate film being located between the ultraviolet ray absorbent film and the substrate glass, whereby iridescence by the ultraviolet ray absorbent film is reduced, and a heat reflecting function is imparted.
Claim 3
Dependent Claim
65 words
The ultraviolet ray absorbent glass according to claim 1, wherein the intermediate film is an intermediate film which satisfies the equation of n m =(n f ×n g ) 1/2 ±10% where n f is the refractive index of the ultraviolet ray absorbent film, n g is the refractive index of the substrate glass and n m is the refractive index of the intermediate film.
Claim 4
Dependent Claim
18 words
The ultraviolet absorbent glass according to claim 2, wherein n m =(n f ×n g ) 1/2 .
Claim 5
Dependent Claim
23 words
The ultraviolet ray absorbent glass according to claim 1, wherein the ultraviolet ray absorbent film comprises cerium oxide, titanium oxide and silicon oxide.
Claim 6
Dependent Claim
18 words
The ultraviolet ray absorbent glass according to claim 1, wherein the intermediate film includes an electric conductive component.
Claim 7
Dependent Claim
57 words
The ultraviolet ray absorbent glass according to claim 1, wherein the intermediate film is partially omitted while the ultraviolet ray absorbent film is formed whereby an interference color is produced at the portion of the ultraviolet ray absorbent film where the intermediate film is partially omitted, thereby providing a transparent ornament or a design in the glass.
Claim 8
Dependent Claim
20 words
The ultraviolet ray absorbent glass according to claim 1, wherein the optical film thickness of the intermediate film is λ/4.
Claim 9
Dependent Claim
25 words
The ultraviolet ray absorbent glass according to claim 1, wherein said ultraviolet ray absorbent film has a refractive index in the range of about 1.9-2.1.
Claim 10
Dependent Claim
86 words
The ultraviolet ray absorbent glass according to claim 1, wherein said metal oxide intermediate film is a two metal oxide component film selected from the group consisting of ZnO--SiO 2 , ZnO--Al 2 O 3 , ZnO--GeO 2 , ZnO--ZrO 2 , TiO 2 --SiO 2 , TiO 2 --Al 2 O 3 , TiO 2 GeO 2 , TiO 2 --ZrO 2 , CeO 2 --SiO 2 , CeO 2 --Al 2 O 3 , CeO 2 --GeO 2 and CeO 2 --ZrO 2 .
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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) | 1999-01-01 | 1999-07-03 | 2000-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-01 | 2003-07-03 | 2004-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-01 | 2007-07-03 | 2008-01-02 | $7700.00 | Window Closed / Lapsed |