US5030593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightly tinted glass compatible with wood tones
Assignee: Vitro SAB de CV
•
Filing: 1990-06-29
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Granted: 1991-07-09
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Expires: 2010-06-29
Abstract
Abstract A clear glass, with the substantial absence of color in transmittance, and with an attractive, bright, edge coloration compatible with wood tone surroundings is achieved in a glass having greater than 85 percent, preferably greater than 87 percent, luminous transmittance by minimizing the amount of iron oxide present in the glass and including very small amounts of selenium and (optionally) cobalt oxide. Various warm, wood tone compatible colors at the edge can be attained, including a "honey" color and almost neutral grays.
Inventors
- 👤 Robert B. Heithoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:16
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/12; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/078; C03C3/083; C03C3/085; C03C3/087; C03C4/00; C03C4/02; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
Clear glass with edge coloration compatible with wood tones comprising a soda-lime-silica base glass comprising: ______________________________________
Weight %
______________________________________
SiO.sub.2
66-75
Na.sub.2 O
12-20
CaO 7-12
MgO 0-5
Al.sub.2 O.sub.3
0-4
K.sub.2 O
0-3
______________________________________ and a colorant portion consisting essentially of: ______________________________________
Total iron (as Fe.sub.2 O.sub.3)
Less than 0.02
Se 0.00003-0.0002
CoO 0-0.0003
______________________________________ whereby the glass exhibits luminous transmittance (illuminant C) of at least 85 percent at a thickness of 0.223 inches (5.66 millimeters), the colorant portion including all essential colorants in the glass.
Claim 2
Dependent Claim
87 words
Clear glass with edge coloration compatible with wood tones comprising a soda-lime-silica base glass comprising: ______________________________________
Weight %
______________________________________
SiO.sub.2
66-75
Na.sub.2 O
12-20
CaO 7-12
MgO 0-5
Al.sub.2 O.sub.3
0-4
K.sub.2 O
0-3
______________________________________ and a colorant portion consisting essentially of: ______________________________________
Total iron (as Fe.sub.2 O.sub.3)
Less than 0.02
Se 0.00003-0.0002
CoO 0-0.0003
______________________________________ whereby the glass exhibits luminous transmittance (illuminant C) of at least 85 percent at a thickness of 0.223 inches (5.66 millimeters), the colorant portion including all essential colorants in the glass.
Claim 3
Dependent Claim
31 words
The glass of claim 1 wherein the total iron oxide content of the glass is less than 0.015 percent by weight of the glass expressed as Fe 2 O 3 .
Claim 4
Dependent Claim
17 words
The glass of claim 1 wherein the glass exhibits a luminous transmittance of at least 87 percent.
Claim 5
Dependent Claim
19 words
The glass of claim 1 wherein the glass exhibits a dominant wavelength in transmission of 570 to 590 nanometers.
Claim 6
Dependent Claim
30 words
The glass of claim 1 wherein the glass exhibits a dominant wavelength in transmission of 578 to 582 nanometers and has a honey color at the edges of a sheet.
Claim 7
Dependent Claim
16 words
The glass of claim 1 wherein the excitation purity in transmission is less than 2.0 percent.
Claim 8
Dependent Claim
26 words
The glass of claim 1 wherein the excitation purity is less than 0.5 percent and has a nearly neutral color at the edges of a sheet.
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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) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |