US5545596A
Expired / Lapsed
US
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Composition for colored glass intended for the manufacture of glazing panes
Assignee: Saint Gobain Glass France SAS
•
Filing: 1995-06-07
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Granted: 1996-08-13
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Expires: 2015-06-07
Abstract
Abstract The invention concerns compositions of colored glasses intended for the manufacture of glazing panes suitable for mounting in an automobile vehicle. The panes are of silico-sodo-calcic glasses having a total energy transmission factor (T E ) less than the light transmission factor under illuminant A (TL A ), the factor T E being from 10 to 48% and the factor TL A from 20 to 60 % for a thickness of 3.85 mm; these glasses comprise (in % by weight), as coloring agents, from 0.45 to 2.5% of Fe 2 O 3 (total iron), from 0.001 to 0.02% of CoO, from 0 to 0.0025% of Se and from 0 to 0.1% of Cr 2 O 3 .
Inventors
- 👤 Pedro Alvarez Casariego
- 👤 Jean-Jacques Massol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:48
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C4/00; C03C4/02; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A coloured glass composition comprising the following oxides within the following limits by weight: ______________________________________
SiO.sub.2
64 to 75%
Al.sub.2 O.sub.3
0 to 5%
B.sub.2 O.sub.3
0 to 5%
CaO 5 to 15%
MgO 0 to 5%
Na.sub.2 O
10 to 18%
K.sub.2 O
0 to 5%
______________________________________ and consisting essentially of as colouring agents: ______________________________________
Fe.sub.2 O.sub.3 (total iron)
0.5 to 1.5%
with FeO content representing from
16 to 55%
of the total iron content expressed in
the form of Fe.sub.2 O.sub.3
CoO 0.003 to 0.015%
Cr.sub.2 O.sub.3 0.025 to 0.09%
Se 0 to 0.0025%
______________________________________ wherein the glasses have a total energy transmission factor (T E ) less than the light transmission factor under illuminant A (TL A ), the factor T E being from 10 to 48% and the factor TL A from 20 to 60% for a thickness of 3.85 millimetres.
Claim 2
Dependent Claim
145 words
A coloured glass composition comprising the following oxides within the following limits by weight: ______________________________________
SiO.sub.2
64 to 75%
Al.sub.2 O.sub.3
0 to 5%
B.sub.2 O.sub.3
0 to 5%
CaO 5 to 15%
MgO 0 to 5%
Na.sub.2 O
10 to 18%
K.sub.2 O
0 to 5%
______________________________________ and consisting essentially of as colouring agents: ______________________________________
Fe.sub.2 O.sub.3 (total iron)
0.5 to 1.5%
with FeO content representing from
16 to 55%
of the total iron content expressed in
the form of Fe.sub.2 O.sub.3
CoO 0.003 to 0.015%
Cr.sub.2 O.sub.3 0.025 to 0.09%
Se 0 to 0.0025%
______________________________________ wherein the glasses have a total energy transmission factor (T E ) less than the light transmission factor under illuminant A (TL A ), the factor T E being from 10 to 48% and the factor TL A from 20 to 60% for a thickness of 3.85 millimetres.
Claim 3
Dependent Claim
29 words
The composition according to claim 1, wherein the FeO content represents from 20 to 40% of the total iron expressed in the form of Fe 2 O 3 .
Claim 4
Dependent Claim
31 words
A glazing pane comprising a coloured glass sheet, wherein the coloured glass sheet has a composition as claimed in claim 1 and having a thickness of from 2 to 8 millimetres.
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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) | 1999-08-13 | 2000-02-12 | 2000-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-13 | 2004-02-12 | 2004-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-13 | 2008-02-12 | 2008-08-13 | $7700.00 | Window Closed / Lapsed |