US5308805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutral, low transmittance glass
Assignee: Pilkington Group Ltd
•
Filing: 1993-05-05
•
Granted: 1994-05-03
•
Expires: 2013-05-05
Abstract
Abstract A neutral, generally green-gray low transmittance (no more than 25 luminous transmittance) soda-lime-silica glass has reduced solar energy transmittance when provided with the following colorant constituents in percent by weight: ______________________________________ Fe 2 O 3 (total iron) 1.3-2 NiO 0.01-0.05 CoO 0.02-0.04 Se 0.0002-0.003 ______________________________________ The glass has a ferrous value in the range of 18 to 30.
Inventors
- 👤 Rodney G. Baker
- 👤 Paige L. Higby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:33
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/02; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C4/08; C03C4/085; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/905
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
105 words
A soda-lime-silica glass having a base glass composition comprising on a weight percent basis: 68-75% SiO 2 , 10-18% Na 2 O, 5-15% CaO, 0-5% MgO, 0-5% Al 2 O 3 and 0-5% K 2 O, and colorants consisting essentially of from about 1.3 to 2 weight percent Fe 2 O 3 (total iron), from about 0.01 to 0.05 weight percent NiO, from about 0.02 to 0.04 weight percent Co 3 O 4 and from 0.0002 to 0.003 weight percent Se, and having a ferrous value in the range of 18 to 30 percent; the glass having a shading coefficient of no more than 0.53.
Claim 2
Dependent Claim
105 words
A soda-lime-silica glass having a base glass composition comprising on a weight percent basis: 68-75% SiO 2 , 10-18% Na 2 O, 5-15% CaO, 0-5% MgO, 0-5% Al 2 O 3 and 0-5% K 2 O, and colorants consisting essentially of from about 1.3 to 2 weight percent Fe 2 O 3 (total iron), from about 0.01 to 0.05 weight percent NiO, from about 0.02 to 0.04 weight percent Co 3 O 4 and from 0.0002 to 0.003 weight percent Se, and having a ferrous value in the range of 18 to 30 percent; the glass having a shading coefficient of no more than 0.53.
Claim 3
Dependent Claim
19 words
A glass as defined in claim 1, having a color defined by the following CIELAB coordinates: a*=-5±5; b*=0±10; L*=50±10.
Claim 4
Dependent Claim
19 words
A glass as defined in claim 1, having a color defined by the following CIELAB coordinates: a*=-4±3; b*=+4±1; L*=50±5.
Claim 5
Dependent Claim
26 words
A glass as defined in claim 1, having a dominant wavelength in the range of 490 to 565 and an excitation purity of less than 10.
Claim 6
Dependent Claim
26 words
A glass as defined in claim 1, having a dominant wavelength in the range of 545 to 565 and an excitation purity of less than 8.
Claim 7
Dependent Claim
136 words
A soda-lime-silica glass having a base glass composition comprising on a weight percent basis: 68-75% SiO 2 , 10-18% Na 2 O, 5-15% CaO, 0-5% MgO, 0-5% Al 2 O 3 and 0-5% K 2 O, and colorants consisting essentially of from about 1.3 to 2 weight percent Fe 2 O 3 (total iron), from about 0.01 to 0.05 weight percent NiO, from about 0.02 to 0.04 weight percent Co 3 O 4 and from 0.0002 to 0.003 weight percent Se, and having a ferrous value in the range of 18 to 30 percent; the glass having a visible light transmittance of no more than 25 percent, a total solar energy transmittance of no more than 25 percent and an ultraviolet radiation transmittance of no more than 15 percent at a nominal thickness of 4 millimeters.
Claim 8
Dependent Claim
136 words
A soda-lime-silica glass having a base glass composition comprising on a weight percent basis: 68-75% SiO 2 , 10-18% Na 2 O, 5-15% CaO, 0-5% MgO, 0-5% Al 2 O 3 and 0-5% K 2 O, and colorants consisting essentially of from about 1.3 to 2 weight percent Fe 2 O 3 (total iron), from about 0.01 to 0.05 weight percent NiO, from about 0.02 to 0.04 weight percent Co 3 O 4 and from 0.0002 to 0.003 weight percent Se, and having a ferrous value in the range of 18 to 30 percent; the glass having a visible light transmittance of no more than 25 percent, a total solar energy transmittance of no more than 25 percent and an ultraviolet radiation transmittance of no more than 15 percent at a nominal thickness of 4 millimeters.
Claim 9
Dependent Claim
27 words
A glass composition as defined in claim 6, wherein said weight percent Fe 2 O 3 (total iron) is in the range of 1.3 to 1.6 percent.
Claim 10
Dependent Claim
22 words
A glass composition as defined in claim 6, wherein said NiO is present in the range of 0.0225 to 0.0285 weight percent.
Claim 11
Dependent Claim
25 words
A glass composition as defined in claim 6, wherein said Co 3 O 4 is present in the range of 0.020 to 0.026 weight percent.
Claim 12
Dependent Claim
22 words
A glass composition as defined in claim 6, wherein said Se is present in the range of 0.0010 to 0.0020 weight percent.
Claim 13
Dependent Claim
24 words
A glass composition as defined in claim 6, wherein said ferrous value is in the range of from about 19 to about 28 percent.
Claim 14
Dependent Claim
23 words
A glass composition as defined in claim 11, having a ferrous value in the range of from about 20 to about 24 percent.
Claim 15
Dependent Claim
19 words
A glass as defined in claim 6, having a color defined by the following CIELAB coordinates: a*=-5±5; b*=0±10; L*=50±5.
Claim 16
Dependent Claim
16 words
A glass as defined in claim 6, having a shading coefficient of no more than 0.53.
Claim 17
Dependent Claim
146 words
A soda-lime-silica glass having a base glass composition comprising on a weight percent basis: 68-75% SiO 2 , 10-18% Na 2 O, 5-15% CaO, 0-5% MgO, 0-5% Al 2 O 3 and 0-5% K 2 O, and colorants consisting essentially of from about 1.3 to 2 weight percent Fe 2 O 3 (total iron), from about 0.01 to 0.05 weight percent NiO, from about 0.02 to 0.04 weight percent Co 3 O 4 and from 0.0002 to 0.003 weight percent Se, and having a ferrous value in the range of 18 to 30 percent; the glass having a visible light transmittance of no more than 20 percent, a total solar energy transmittance of no more than 18 percent and not exceeding the value of the visible light transmittance, and an ultraviolet radiation transmittance of no more than 15 percent at a nominal thickness of 4 millimeters.
Claim 18
Dependent Claim
146 words
A soda-lime-silica glass having a base glass composition comprising on a weight percent basis: 68-75% SiO 2 , 10-18% Na 2 O, 5-15% CaO, 0-5% MgO, 0-5% Al 2 O 3 and 0-5% K 2 O, and colorants consisting essentially of from about 1.3 to 2 weight percent Fe 2 O 3 (total iron), from about 0.01 to 0.05 weight percent NiO, from about 0.02 to 0.04 weight percent Co 3 O 4 and from 0.0002 to 0.003 weight percent Se, and having a ferrous value in the range of 18 to 30 percent; the glass having a visible light transmittance of no more than 20 percent, a total solar energy transmittance of no more than 18 percent and not exceeding the value of the visible light transmittance, and an ultraviolet radiation transmittance of no more than 15 percent at a nominal thickness of 4 millimeters.
Claim 19
Dependent Claim
16 words
A glass as defined in claim 15, having a shading coefficient of no more than 0.53.
Claim 20
Dependent Claim
16 words
A glass as defined in claim 16, having a shading coefficient of no more than 0.46.
Claim 21
Dependent Claim
136 words
A soda-lime-silica glass having a base glass composition comprising on a weight percent basis: 68-75% SiO 2 , 10-18% Na 2 O, 5-15% CaO, 0-5% MgO, 0-5% Al 2 O 3 and 0-5% K 2 O, and colorants consisting essentially of from about 1.3 to 1.6 weight percent Fe 2 O 3 (total iron), from about 0.0225 to 0.0285 weight percent NiO, from about 0.020 to 0.026 weight percent Co 3 O 4 and from 0.0010 to 0.0020 weight percent Se, and having a ferrous value in the range of 18 to 30 percent; the glass having a visible light transmittance of no more than 25 percent, a total solar energy transmittance of no more than 25 percent and an ultraviolet radiation transmittance of no more than 15 percent at a nominal thickness of 4 millimeters.
Claim 22
Dependent Claim
136 words
A soda-lime-silica glass having a base glass composition comprising on a weight percent basis: 68-75% SiO 2 , 10-18% Na 2 O, 5-15% CaO, 0-5% MgO, 0-5% Al 2 O 3 and 0-5% K 2 O, and colorants consisting essentially of from about 1.3 to 1.6 weight percent Fe 2 O 3 (total iron), from about 0.0225 to 0.0285 weight percent NiO, from about 0.020 to 0.026 weight percent Co 3 O 4 and from 0.0010 to 0.0020 weight percent Se, and having a ferrous value in the range of 18 to 30 percent; the glass having a visible light transmittance of no more than 25 percent, a total solar energy transmittance of no more than 25 percent and an ultraviolet radiation transmittance of no more than 15 percent at a nominal thickness of 4 millimeters.
Claim 23
Dependent Claim
19 words
A glass as defined in claim 18, said glass having ferrous value in the range of 20 to 24.
Claim 24
Dependent Claim
51 words
A glass as defined in claim 19, said glass having a visible light transmittance of no more than 20 percent, a total solar energy transmittance of no more than 18 percent and not exceeding the value of the visible light transmittance, and ultraviolet radiation transmittance of no more than 15 percent.
Claim 25
Dependent Claim
18 words
A glass as defined in claim 18, said glass having a shading coefficient of no more than 0.46.
Claim 26
Dependent Claim
26 words
A glass as defined in claim 18, having a dominant wavelength in the range of 545 to 565 and an excitation purity of less than 8.
Claim 27
Dependent Claim
19 words
A glass as defined in claim 18, having a color defined by the following CIELAB coordinates: a*=-4±3; b*=+4±1; L*=50±5.
Claim 28
Dependent Claim
18 words
A glass as defined in claim 23, having a color defined by the CIELAB coordinates a*=-4; b*=+3; L*=48±2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-02 | 1997-11-01 | 1998-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-02 | 2001-11-01 | 2002-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-02 | 2005-11-01 | 2006-05-03 | $7700.00 | Window Closed / Lapsed |