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US5070048A
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Blue glass compositions
Assignee: Automotive Components Holdings LLC
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Filing: 1990-12-12
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Granted: 1991-12-03
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Expires: 2010-12-12
Abstract
Abstract A blue glass composition comprises conventional soda-lime-silica glass ingredients and specific amounts of Fe 2 O 3 , Co 3 O 4 , NiO, and optionally Se, resulting in an Illuminant C transmittance of 54% ±3% at one quarter inch thickness, a dominant wavelength of 482 nm±1 nm, and a color purity of 13% ±1%.
Inventors
- 👤 Edward N. Boulos
- 👤 Mark F. Best
- 👤 Roman Surowiec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:58
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03B; C03B5/00; C03C3/078; C03C4/00; C03C4/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
164 words
A blue-colored glass having an Illuminant C transmittance of 54%±3% at a glass thickness of one quarter inch, a dominant wavelength of 482 nm±1 nm, and a color purity of 13%±1%, consisting essentially of: A. 68% to 75% by weight SiO 2 ; B. up to 5% by weight Al 2 O 3 ; C. 5% to 15% by weight CaO; D. up to 10% by weight MgO, wherein CaO+MgO is 6% to 15% by weight; E. 10% to 18% by weight Na 2 O; F. up to 5% by weight K 2 O, wherein Na 2 O+K 2 O is 10% to 20% by weight; and G. colorant selected from the group consisting of: i. 0.290% by weight Fe 2 O 3 , 0.0055% by weight Co 3 O 4 , and 0.0072% by weight NiO; and ii. 0.430% by weight Fe 2 O 3 , 0.0054% by weight Co 3 O 4 , 0.0035% by weight NiO, and 0.00015% by weight selenium.
Claim 2
Dependent Claim
164 words
A blue-colored glass having an Illuminant C transmittance of 54%±3% at a glass thickness of one quarter inch, a dominant wavelength of 482 nm±1 nm, and a color purity of 13%±1%, consisting essentially of: A. 68% to 75% by weight SiO 2 ; B. up to 5% by weight Al 2 O 3 ; C. 5% to 15% by weight CaO; D. up to 10% by weight MgO, wherein CaO+MgO is 6% to 15% by weight; E. 10% to 18% by weight Na 2 O; F. up to 5% by weight K 2 O, wherein Na 2 O+K 2 O is 10% to 20% by weight; and G. colorant selected from the group consisting of: i. 0.290% by weight Fe 2 O 3 , 0.0055% by weight Co 3 O 4 , and 0.0072% by weight NiO; and ii. 0.430% by weight Fe 2 O 3 , 0.0054% by weight Co 3 O 4 , 0.0035% by weight NiO, and 0.00015% by weight selenium.
Claim 3
Dependent Claim
15 words
A glazing for automotive or architectural use prepared from the blue-colored glass of claim 1.
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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) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |