US5837629A
Expired / Lapsed
US
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Glass composition for making glazing
Assignee: Saint Gobain Vitrage SA
•
Filing: 1995-06-22
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Granted: 1998-11-17
•
Expires: 2015-06-22
Abstract
Abstract A silica-soda-lime glass composition suitable for making glazing. Said glass consists of 69-75 wt % SiO 2 , 0-3 wt % Al 2 O 3 , 0-5 wt % B 2 O 3 , 2-10 wt % CaO, 0-2 wt % MgO, 9-17 wt % Na 2 O, 0-8 wt % K 2 O, 0.2-4 wt % Fe 2 O 3 (total iron), and 0-0.45 wt % Se, CoO, Cr 2 O 3 , NiO, CuO. The amount of tinting agents other than iron is at least 0.0002 wt % when the Fe 2 O 3 content is 1.5 wt % or less. The composition may also contain fluorine; zinc, zirconium, cerium and titanium oxides; and less than 4 wt % barium oxide; while the sum of the percentages of alkaline earth oxides is not above 10 wt %.
Inventors
- 👤 Jean-Marie Combes
- 👤 Pedro Pablo Mazon-Ramos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:37
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/02; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C3/095
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
141 words
A glass composition which consists essentially of the following constituents expressed in weight percentage, defined by the following limits: ______________________________________
SiO.sub.2 69 to 75%
Al.sub.2 O.sub.3 0 to 3%
B.sub.2 O.sub.3 0 to 5%
CaO 2 to 10%
MgO 0 to 2%
Na.sub.2 O 9 to 17%
K.sub.2 O 0 to 8%
Fe.sub.2 O.sub.3 (total iron)
0.2 to 4%, and as an additional
colouring agent, at least one of
Se, CoO, Cr.sub.2 O.sub.3, NiO, and CuO
0 to 0.45%
______________________________________ the additional colouring agent content being at least equal to 0.0002% when the Fe 2 O 3 content is equal to or less than to 1.5%, wherein said composition may contain fluorine, zinc oxide, zirconium oxide, cerium oxide, titanium oxide and less than 4% of barium oxide, the sum of alkaline earth metal oxide percentages being equal or less than 10%.
Claim 2
Dependent Claim
141 words
A glass composition which consists essentially of the following constituents expressed in weight percentage, defined by the following limits: ______________________________________
SiO.sub.2 69 to 75%
Al.sub.2 O.sub.3 0 to 3%
B.sub.2 O.sub.3 0 to 5%
CaO 2 to 10%
MgO 0 to 2%
Na.sub.2 O 9 to 17%
K.sub.2 O 0 to 8%
Fe.sub.2 O.sub.3 (total iron)
0.2 to 4%, and as an additional
colouring agent, at least one of
Se, CoO, Cr.sub.2 O.sub.3, NiO, and CuO
0 to 0.45%
______________________________________ the additional colouring agent content being at least equal to 0.0002% when the Fe 2 O 3 content is equal to or less than to 1.5%, wherein said composition may contain fluorine, zinc oxide, zirconium oxide, cerium oxide, titanium oxide and less than 4% of barium oxide, the sum of alkaline earth metal oxide percentages being equal or less than 10%.
Claim 3
Dependent Claim
24 words
The glass composition as claimed in claim 1 wherein the total content of additional colouring agent is in a range of 0 to 0.15%.
Claim 4
Dependent Claim
17 words
The glass composition as claimed in claim 1 wherein the content of MgO is less than 1%.
Claim 5
Dependent Claim
25 words
The glass composition as claimed in claim 1 wherein the total content of Na 2 O and K 2 O is greater than about 15%.
Claim 6
Dependent Claim
20 words
The glass composition as claimed in claim 1 wherein said glass composition comprises 0.5 to 3.5% by weight of BaO.
Claim 7
Dependent Claim
21 words
The glass composition as claimed in claim 1 wherein said glass composition comprises of 0.5 to 2% by weight of fluorine.
Claim 8
Dependent Claim
20 words
The glass composition as claimed in claim 1 wherein said glass composition comprises 0.05 to 3% by weight of ZnO.
Claim 9
Dependent Claim
22 words
The glass composition as claimed in claim 1 wherein said glass composition contains 0 to 1.5% by weight of ZrO 2 .
Claim 10
Dependent Claim
24 words
The glass composition as claimed in claim 1 wherein said glass composition contains 0 to 1.5% by weight of Ce 2 O 3 .
Claim 11
Dependent Claim
21 words
The glass composition as claimed in claim 1 wherein said glass composition comprises upto 1% by weight of TiO 2 .
Claim 12
Dependent Claim
40 words
The glass composition as claimed in claim 1, wherein said glass composition simultaneously comprises cerium oxide and titanium oxide, wherein the sum Ce 2 O 3 +TiO 2 is equal to or less than 1.2% and above 0% by weight.
Claim 13
Dependent Claim
30 words
The glass composition as claimed in claim 1 wherein said glass composition comprises FeO in a proportion such that a ratio of FeO/Fe 2 O 3 is less than 0.8.
Claim 14
Dependent Claim
34 words
The glass composition as claimed in claim 1 wherein said additional colouring agents are present according to the weight contents defined by the following limits: Se<0.008% CoO<0.04% Cr 2 O 3 <0.1% NiO<0.07% CuO<0.3%.
Claim 15
Dependent Claim
22 words
The glass composition as claimed in claim 1 wherein said glass composition has a dominant wavelength sub-illuminating C inferior to 560 manometers.
Claim 16
Dependent Claim
30 words
Glass window comprising a sheet of glass wherein said sheet has a chemical composition as claimed in claim 1, said sheet having a thickness of between 0.8 to 10 millimeters.
Claim 17
Dependent Claim
15 words
The glass composition as claimed in claim 1 wherein the content of MgO is 0.
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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) | 2001-11-16 | 2002-05-18 | 2002-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-16 | 2006-05-18 | 2006-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-16 | 2010-05-18 | 2010-11-17 | $7700.00 | Window Closed / Lapsed |