US4701425A
Expired / Lapsed
US
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Infrared and ultraviolet absorbing glass compositions
Assignee: Pilkington North America Inc
•
Filing: 1986-05-19
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Granted: 1987-10-20
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Expires: 2006-05-19
Abstract
Abstract A soda-lime-silica glass composition containing TiO 2 for forming glass articles, e.g., glazings, the composition absorbing both infrared and ultraviolet radiation and having an Illuminant A (red and blue end of the spectrum) transmittance of about 68 percent or more, an Illuminant C transmittance of at least about 70 percent, and a solar ultraviolet transmittance of about 50 percent.
Inventors
- 👤 Rodney G. Baker
- 👤 Daniel P. Lubelski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:17
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/08; C03C4/082; C03C3/00; C03C3/04; C03C3/076; C03C3/078; C03C3/083; C03C3/085; C03C3/087; C03C4/085; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904; Y10S501/905
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
A glass composition consisting essentially of the following ingredients in approximate percent by weight: ______________________________________
Ingredients Percent by Weight
______________________________________
SiO.sub.2 60-80
Na.sub.2 O 10-20
K.sub.2 O 0-10
CaO 5-16
MgO 0-10
Al.sub.2 O.sub.3
0-5
SO.sub.3 0-0.5
Fe.sub.2 O3 0.29-0.6
SnO.sub.2 0.1-1.5
TiO.sub.2 0.1-1.6
______________________________________ the composition absorbing both infrared and ultraviolet rays.
Claim 2
Dependent Claim
53 words
A glass composition consisting essentially of the following ingredients in approximate percent by weight: ______________________________________
Ingredients Percent by Weight
______________________________________
SiO.sub.2 60-80
Na.sub.2 O 10-20
K.sub.2 O 0-10
CaO 5-16
MgO 0-10
Al.sub.2 O.sub.3
0-5
SO.sub.3 0-0.5
Fe.sub.2 O3 0.29-0.6
SnO.sub.2 0.1-1.5
TiO.sub.2 0.1-1.6
______________________________________ the composition absorbing both infrared and ultraviolet rays.
Claim 3
Dependent Claim
39 words
A glass compositon as defined in claim 1 in which Fe 2 O 3 is about 0.470 to 0.510 weight percent, SnO 2 is about 0.42 to 0.52 weight percent, TiO 2 is about 0.40 to 0.50 weight percent.
Claim 4
Dependent Claim
18 words
A glass composition as defined in claim 1 in which the TiO 2 is about 0.45 weight percent.
Claim 5
Dependent Claim
53 words
A glass composition consisting essentially of the following ingredients in approximate percent by weight: ______________________________________
Ingredients Percent by weight
______________________________________
SiO.sub.2 70-74
Na.sub.2 O 12-16
K.sub.2 O 0-1
CaO 5-11
MgO 2-6
Al.sub.2 O.sub.3
0-1
SO.sub.3 0-1
Fe.sub.2 O.sub.3
0.450-0.550
SnO.sub.2 0.42-0.52
TiO.sub.2 0.40-0.50
______________________________________ the glass absorbing both infrared and ultraviolet radiation.
Claim 6
Dependent Claim
53 words
A glass composition consisting essentially of the following ingredients in approximate percent by weight: ______________________________________
Ingredients Percent by weight
______________________________________
SiO.sub.2 70-74
Na.sub.2 O 12-16
K.sub.2 O 0-1
CaO 5-11
MgO 2-6
Al.sub.2 O.sub.3
0-1
SO.sub.3 0-1
Fe.sub.2 O.sub.3
0.450-0.550
SnO.sub.2 0.42-0.52
TiO.sub.2 0.40-0.50
______________________________________ the glass absorbing both infrared and ultraviolet radiation.
Claim 7
Dependent Claim
19 words
A composition as defined in claim 4 in which the amount of TiO 2 is about 0.45 weight percent.
Claim 8
Dependent Claim
40 words
A glass composition as defined in claim 1 in which Fe 2 O 3 is about 0.345 to 0.365 weight percent, SnO 2 is about 0.85 to 1.05 weight percent, and TiO 2 is about 0.90 to 1.10 weight percent.
Claim 9
Dependent Claim
18 words
A glass composition as defined in claim 1 in which the TiO 2 is about 1.00 weight percent.
Claim 10
Dependent Claim
53 words
A glass composition consisting essentially of the following ingredients in approximate percent by weight: ______________________________________
Ingredients Percent by Weight
______________________________________
SiO.sub.2 68-74
Na.sub.2 O 11-14
K.sub.2 O 0-1
CaO 6-13
MgO 1.5-4
Al.sub.2 O.sub.3
0-3.5
SO.sub.3 0-0.5
Fe.sub.2 O.sub.3
0.345-0.365
SnO.sub.2 0.85-1.05
TiO.sub.2 0.90-1.10
______________________________________ the glass absorbing both infrared and ultraviolet radiation.
Claim 11
Dependent Claim
53 words
A glass composition consisting essentially of the following ingredients in approximate percent by weight: ______________________________________
Ingredients Percent by Weight
______________________________________
SiO.sub.2 68-74
Na.sub.2 O 11-14
K.sub.2 O 0-1
CaO 6-13
MgO 1.5-4
Al.sub.2 O.sub.3
0-3.5
SO.sub.3 0-0.5
Fe.sub.2 O.sub.3
0.345-0.365
SnO.sub.2 0.85-1.05
TiO.sub.2 0.90-1.10
______________________________________ the glass absorbing both infrared and ultraviolet radiation.
Claim 12
Dependent Claim
19 words
A composition as defined in claim 8 in which the amount of TiO 2 is about 1.00 weight percent.
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) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |