Patent EP0482535B1 successfully refreshed from Google Patents.
EP0482535B1
Expired / Lapsed
EP
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Dark gray, infrared absorbing glass composition and product
Assignee: PPG Industries Ohio Inc
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Filing: 1991-10-19
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Granted: 1995-07-26
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Expires: 2011-10-19
Abstract
No abstract record available.
Inventors
- 👤 Anthony Vincent Longobardo
- 👤 John Franklin Krumwiede
- 👤 Josepf Anthony Gulotta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 02:16
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/08; C03C4/082; C03C1/00; C03C1/10; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C4/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
48 words
A neutral gray colored glass composition having a base glass portion comprising: and a colorant portion consisting essentially of: the glass having a luminous transmittance of no more than 32 percent, and a total solar infrared transmittance of less than 15 percent at a thickness of 3.9 millimeters.
Claim 2
Dependent Claim
48 words
A neutral gray colored glass composition having a base glass portion comprising: and a colorant portion consisting essentially of: the glass having a luminous transmittance of no more than 32 percent, and a total solar infrared transmittance of less than 15 percent at a thickness of 3.9 millimeters.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the FeO concentration is at least 0.30 weight percent.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein the FeO concentration is at least 0.35 weight percent.
Claim 5
Dependent Claim
27 words
The composition of claim 1 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 13 percent at 3.9 millimeters thickness.
Claim 6
Dependent Claim
27 words
The composition of claim 1 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 10 percent at 3.9 millimeters thickness.
Claim 7
Dependent Claim
22 words
The composition of claim 1 wherein the color of the glass is characterized by dominant wavelengths in the range of 485-510 nanometers.
Claim 8
Dependent Claim
22 words
The composition of claim 6 wherein the color of the glass is characterized by an excitation purity of less than 5 percent.
Claim 9
Dependent Claim
48 words
An article of manufacture comprising a glass sheet having a base glass portion comprising: and a colorant portion consisting essentially of: the glass having a luminous transmittance of no more than 32 percent, and total solar infrared transmittance less than 15 percent at a thickness of 3.9 millimeters.
Claim 10
Dependent Claim
48 words
An article of manufacture comprising a glass sheet having a base glass portion comprising: and a colorant portion consisting essentially of: the glass having a luminous transmittance of no more than 32 percent, and total solar infrared transmittance less than 15 percent at a thickness of 3.9 millimeters.
Claim 11
Dependent Claim
14 words
The article of claim 8 wherein the sheet has a thickness of 2-10 millimeters.
Claim 12
Dependent Claim
14 words
The article of claim 8 wherein the sheet has a thickness of 3-6 millimeters.
Claim 13
Dependent Claim
22 words
The article of claim 8 wherein a surface portion of the sheet includes at least 0.05 percent by weight Sn0 2 .
Claim 14
Dependent Claim
20 words
The article of claim 8 wherein the luminous transmittance is less than 30 percent at a thickness of 3.9 millimeters.
Claim 15
Dependent Claim
15 words
The article of claim 8 wherein the FeO concentration is at least 0.30 weight percent.
Claim 16
Dependent Claim
15 words
The article of claim 8 wherein the FeO concentration is at least 0.35 weight percent.
Claim 17
Dependent Claim
27 words
The article of claim 8 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 13 percent at 3.9 millimeters thickness.
Claim 18
Dependent Claim
27 words
The article of claim 8 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 10 percent at 3.9 millimeters thickness.
Claim 19
Dependent Claim
19 words
The article of claim 8 further including a reflective coating on at least one surface of the glass sheet.
Claim 20
Dependent Claim
21 words
The article of claim 17 wherein the coating has a reflectance from the coated surface of no more than 20 percent.
Claim 21
Dependent Claim
18 words
The article of claim 18 wherein the reflectance from the uncoated surface is no greater than 10 percent.
Claim 22
Dependent Claim
13 words
The article of claim 17 wherein the coating consists essentially of titanium dioxide.
Claim 23
Dependent Claim
18 words
The article of claim 17 wherein the coating consists essentially of mixed oxides of cobalt, iron, and chromium.
Claim 24
Dependent Claim
22 words
The article of claim 8 wherein the color of the glass is characterized by dominant wavelengths in the range of 485-510 nanometers.
Claim 25
Dependent Claim
22 words
The article of claim 22 wherein the color of the glass is characterized by an excitation purity of less than 5 percent.
References Cited (Backward Citations)
No citation records indexed.
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