US5411922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutral gray-green low transmittance heat absorbing glass
Assignee: Ford Global Technologies LLC
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Filing: 1993-12-27
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Granted: 1995-05-02
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Expires: 2013-12-27
Abstract
Abstract A heat absorbing, neutral gray to green, soda-lime-silica glass having at 4 mm. control thickness a light transmittance using illuminant A of 10.0% to 60.0%, ultra violet transmittance less than 25.0%, infra red transmittance is less than about 50.0%, and the purity of excitation is less than 6.0% which is produced from colorants consisting of 0.90 to 1.90 percent by weight total iron oxide as Fe 2 O 3 , 0,002 to 0.025 percent Co, 0.0010 to 0.0060 percent Se, and 0.1 to 2.0 percent TiO 2 . The flat glass products having such a composition is particularly suitable for use as a privacy glass or sun roof product in trucks and automobiles.
Inventors
- 👤 James V. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:45
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/02; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904; Y10S501/905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
146 words
A heat absorbing, neutral gray to green colored glass composition having a base glass composition comprising: 65 to 75% SiO 2 , 10 to 18% Na 2 O, 5 to 15% CaO, 3 to 5% MgO, 0 to 5% Al 2 O 3 , and 0 to 5% K 2 O and colorants consisting essentially of: 0.90 to 1.90 wt. % total iron oxide as Fe 2 O 3 ; 0.002 to 0,025 wt. % cobalt oxide as Co; 0.0010 to 0.0060 wt. % selenium as Se; and 0.1 to 2.0% titanium oxide as TiO 2 , the glass at 4 mm. control thickness having light transmittance using illuminant A of 10.0% and 60.0%, ultra violet transmittance less than 25.0%, infra red transmittance is less than about 50.0%, dominant wavelength with illuminant C between 480 and 575.5 nanometers, and an excitation purity of less than 6.0%.
Claim 2
Dependent Claim
146 words
A heat absorbing, neutral gray to green colored glass composition having a base glass composition comprising: 65 to 75% SiO 2 , 10 to 18% Na 2 O, 5 to 15% CaO, 3 to 5% MgO, 0 to 5% Al 2 O 3 , and 0 to 5% K 2 O and colorants consisting essentially of: 0.90 to 1.90 wt. % total iron oxide as Fe 2 O 3 ; 0.002 to 0,025 wt. % cobalt oxide as Co; 0.0010 to 0.0060 wt. % selenium as Se; and 0.1 to 2.0% titanium oxide as TiO 2 , the glass at 4 mm. control thickness having light transmittance using illuminant A of 10.0% and 60.0%, ultra violet transmittance less than 25.0%, infra red transmittance is less than about 50.0%, dominant wavelength with illuminant C between 480 and 575.5 nanometers, and an excitation purity of less than 6.0%.
Claim 3
Dependent Claim
21 words
The glass composition according to claim 1, wherein SO 3 present in said composition is about 0.1 to 0.3 wt. %.
Claim 4
Dependent Claim
15 words
The glass composition according to claim 1, wherein said light transmittance is between about 16-20%.
Claim 5
Dependent Claim
21 words
The glass composition according to claim 1, wherein said ultraviolet transmission is about 5-10% and said infrared transmission is about 8-19%.
Claim 6
Dependent Claim
15 words
The glass composition according to claim 1, wherein said dominant wavelength is about 488-560 nanometers.
Claim 7
Dependent Claim
21 words
The glass composition according to claim 1, wherein the FeO/total iron oxide as Fe 2 O 3 is 0.15 to 0.30.
Claim 8
Dependent Claim
146 words
A heat absorbing, neutral gray to green colored glass composition having a base glass composition comprising: 65 to 75% SiO 2 , 10 to 18% Na 2 O, 5 to 15% CaO, 3 to 5% MgO, 0 to 5% Al 2 O 3 , and 0 to 5% K 2 O and colorants consisting essentially of: 1.2 to 1.85 wt. % total iron oxide as Fe 2 O 3 ; 0.0130 to 0.0190 wt. % cobalt oxide as Co: 0.0010 to 0.0040 wt. % selenium as Se; and 0.10 to 0.50% titanium oxide as TiO 2 ; the glass at 4 mm. control thickness having light transmittance using illuminant A of 16.0% and 20.0%, ultra violet transmittance less than 10.0%, infra red transmittance is less than about 19.0%, dominant wavelength with illuminant C between 488 and 560 nanometers, and an excitation purity of less than 6.0%.
Claim 9
Dependent Claim
146 words
A heat absorbing, neutral gray to green colored glass composition having a base glass composition comprising: 65 to 75% SiO 2 , 10 to 18% Na 2 O, 5 to 15% CaO, 3 to 5% MgO, 0 to 5% Al 2 O 3 , and 0 to 5% K 2 O and colorants consisting essentially of: 1.2 to 1.85 wt. % total iron oxide as Fe 2 O 3 ; 0.0130 to 0.0190 wt. % cobalt oxide as Co: 0.0010 to 0.0040 wt. % selenium as Se; and 0.10 to 0.50% titanium oxide as TiO 2 ; the glass at 4 mm. control thickness having light transmittance using illuminant A of 16.0% and 20.0%, ultra violet transmittance less than 10.0%, infra red transmittance is less than about 19.0%, dominant wavelength with illuminant C between 488 and 560 nanometers, and an excitation purity of less than 6.0%.
Claim 10
Dependent Claim
12 words
An automotive or architectural glazing. made from the composition of claim 1.
Claim 11
Dependent Claim
12 words
An automotive or architectural glazing made from the composition of claim 7.
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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) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |