US5565388A
Expired / Lapsed
US
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Bronze glass composition
Assignee: Vitro SAB de CV
•
Filing: 1995-04-03
•
Granted: 1996-10-15
•
Expires: 2015-04-03
Abstract
Abstract The present invention provides a glass composition having a bronze color and a luminous (visible) transmittance of 70% or greater. The base glass is a soda-lime-silica composition and iron and selenium are added as colorants. In one particular embodiment of the invention, a bronze colored glass with a luminous transmittance (C.I.E. illuminant A) of 70% and higher at a thickness of 4.1 millimeters may be attained by using as colorants: 0.4 to 0.6 wt. % Fe2O3, 0.09 to 0.17 wt. % FeO and 3 to 11 PPM Se. In addition, it is preferred that the total solar energy transmittance be no greater than 60%.
Inventors
- 👤 John F. Krumwiede
- 👤 Larry J. Shelestak
- 👤 Anthony V. Longobardo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:02
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C4/00; C03C4/02; C03C4/08; C03C4/085
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
133 words
A bronze colored glass composition having a base glass portion comprising, in percent by weight: ______________________________________
SiO.sub.2 66 to 75
Na.sub.2 O 10 to 20
CaO 5 to 15
MgO 0 to 5
Al.sub.2 O.sub.3
0 to 5
K.sub.2 O 0 to 5
______________________________________ and a colorant portion consisting essentially of: ______________________________________
Fe.sub.2 O.sub.3 (total iron)
about 0.4 to 0.6 percent by weight
FeO about 0.09 to 0.17 percent by weight
Se about 3 to 11 PPM
______________________________________ the glass having a luminous transmittance of about 70% or greater and a color characterized by a dominant wavelength in the range of about 540 to 567.2 nanometers at a thickness of 4.1 millimeters and a monochromatic transmittance which on the average decreases from the shorter wavelengths to the longer wavelengths in the visible spectrum.
Claim 2
Dependent Claim
133 words
A bronze colored glass composition having a base glass portion comprising, in percent by weight: ______________________________________
SiO.sub.2 66 to 75
Na.sub.2 O 10 to 20
CaO 5 to 15
MgO 0 to 5
Al.sub.2 O.sub.3
0 to 5
K.sub.2 O 0 to 5
______________________________________ and a colorant portion consisting essentially of: ______________________________________
Fe.sub.2 O.sub.3 (total iron)
about 0.4 to 0.6 percent by weight
FeO about 0.09 to 0.17 percent by weight
Se about 3 to 11 PPM
______________________________________ the glass having a luminous transmittance of about 70% or greater and a color characterized by a dominant wavelength in the range of about 540 to 567.2 nanometers at a thickness of 4.1 millimeters and a monochromatic transmittance which on the average decreases from the shorter wavelengths to the longer wavelengths in the visible spectrum.
Claim 3
Dependent Claim
42 words
The composition as in claim 1 wherein the Fe 2 O 3 (total iron) concentration is from 0.45 to 0.53 wt. %, the FeO concentration is from 0.1 to 0.15 wt. % and the Se concentration is from 5 to 10 PPM.
Claim 4
Dependent Claim
42 words
The composition as in claim 1 wherein the Fe 2 O 3 (total iron) concentration is from 0.52 to 0.6 wt. %, the FeO concentration is from 0.14 to 0.16 wt. % and the Se concentration is from 4 to 8 PPM.
Claim 5
Dependent Claim
12 words
The composition as in claim 1 further including additional ultraviolet absorbing material.
Claim 6
Dependent Claim
44 words
The composition as in claim 4 wherein said ultraviolet absorbing material is an oxide of a material selected from a group consisting essentially of cerium, vanadium, titanium and molybdenum and combination thereof in an amount up to 2.0 wt. % of the glass composition.
Claim 7
Dependent Claim
20 words
The composition as in claim 5 wherein said TiO 2 is in an amount from 0.1 to 1.0 wt. %.
Claim 8
Dependent Claim
20 words
The composition as in claim 6 wherein said TiO 2 is in an amount from 0.2 to 0.5 wt. %.
Claim 9
Dependent Claim
59 words
The composition as in claim 1 wherein the glass has an average monochromatic transmittance value within the visible spectrum over a first wavelength range below said wavelength corresponding to said maximum monochromatic transmittance, which is up to 10% greater than an average monochromatic transmittance value over a second wavelength range above said wavelength corresponding to said maximum monochromatic transmittance.
Claim 10
Dependent Claim
35 words
The composition as in claim 8 wherein said average monochromatic transmittance over said first range is between 65 and 71% and said average monochromatic transmittance over said second range is between 60 and 66 percent.
Claim 11
Dependent Claim
12 words
A glass sheet made from the composition as recited in claim 1.
Claim 12
Dependent Claim
18 words
The glass sheet as in claim 10 wherein the sheet has a thickness between 1.8 to 6 millimeters.
Claim 13
Dependent Claim
21 words
The glass sheet as in claim 10 wherein the glass has a total solar energy transmittance of no greater than 60%.
Claim 14
Dependent Claim
31 words
The glass sheet as in claim 12 wherein the Fe 2 O 3 concentration is at least 0.5 wt. %, and the total solar energy transmittance is no greater than 55%.
Claim 15
Dependent Claim
25 words
The composition as in claim 1 wherein the glass color is characterized by a dominant wavelength in the range of about 540 to 565 nanometers.
Claim 16
Dependent Claim
136 words
A bronze colored glass composition having a base glass portion comprising, in percent by weight: ______________________________________
SiO.sub.2 66 to 75
Na.sub.2 O 10 to 20
CaO 5 to 15
MgO 0 to 5
Al.sub.2 O.sub.3
0 to 5
K.sub.2 O 0 to 5
______________________________________ and a colorant portion consisting essentially of: ______________________________________
Fe.sub.2 O.sub.3 (total iron)
about 0.4 to 0.6 percent by weight
FeO about 0.1 to 0.17 percent by weight
Se about 3 to 11 PPM
CoO 0 to about 5 PPM
NiO 0 to about 50 PPM
Cr.sub.2 O.sub.3
0 to about 50 PPM
______________________________________ wherein the glass has a luminous transmittance of about 70% or greater and the color of the glass is characterized by a dominant wavelength in the range of about 540 to 567.2 nanometers at a thickness of 4.1 millimeters.
Claim 17
Dependent Claim
136 words
A bronze colored glass composition having a base glass portion comprising, in percent by weight: ______________________________________
SiO.sub.2 66 to 75
Na.sub.2 O 10 to 20
CaO 5 to 15
MgO 0 to 5
Al.sub.2 O.sub.3
0 to 5
K.sub.2 O 0 to 5
______________________________________ and a colorant portion consisting essentially of: ______________________________________
Fe.sub.2 O.sub.3 (total iron)
about 0.4 to 0.6 percent by weight
FeO about 0.1 to 0.17 percent by weight
Se about 3 to 11 PPM
CoO 0 to about 5 PPM
NiO 0 to about 50 PPM
Cr.sub.2 O.sub.3
0 to about 50 PPM
______________________________________ wherein the glass has a luminous transmittance of about 70% or greater and the color of the glass is characterized by a dominant wavelength in the range of about 540 to 567.2 nanometers at a thickness of 4.1 millimeters.
Claim 18
Dependent Claim
33 words
The composition as in claim 15 wherein the color of the glass is characterized by a dominant wavelength in the range of about 540 to 565 nanometers at a thickness of 4.1 millimeters.
Claim 19
Dependent Claim
30 words
The composition as in claim 16 wherein the glass has a monochromatic transmittance which on the average decreases from the shorter wavelengths to the longer wavelengths in the visible spectrum.
Claim 20
Dependent Claim
26 words
The composition as in claim 16 wherein the glass has a total solar energy transmittance of no greater than 60% at a thickness of 4.1 millimeters.
Claim 21
Dependent Claim
12 words
The composition as in claim 18 further including additional ultraviolet absorbing material.
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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) | 1999-10-15 | 2000-04-15 | 2000-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-15 | 2004-04-15 | 2004-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-15 | 2008-04-15 | 2008-10-15 | $7700.00 | Window Closed / Lapsed |