US5362689A
Expired / Lapsed
US
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Infrared and ultraviolet ray absorbing glass
Assignee: Central Glass Co Ltd
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Filing: 1993-08-27
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Granted: 1994-11-08
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Expires: 2013-08-27
Abstract
Abstract An infrared and ultraviolet ray absorbing glass suitable for use in building and vehicle windows, which comprises, on a weight basis, 68-72% SiO 2 , 1.6-3.0% Al 2 O 3 , 8.5-11.0% CaO, 2.0-4.2% MgO, 12.0-16.0% Na 2 O, 0.5-3.0% K 2 O, 0.08-0.30% SO 3 , 0.58-0.80% total iron expressed as Fe 2 O 3 , 0.10-0.60% CeO 2 , 0.10-0.40% TiO 2 and 5-350 ppm MnO. In the glass the ratio of ferrous iron to ferric iron is from 0.3 to 0.7. The glass has a greenish tint and is well balanced in visible light transmittance, infrared radiation absorption and ultraviolet radiation absorption. The glass can easily be produced as a sheet glass by the conventional float process without significantly varying the melting and refining operation conditions, and the glass sheet can readily be tempered by a conventional method.
Inventors
- 👤 Shigeki Morimoto
- 👤 Tadashi Noguchi
- 👤 Yasusi Taguchi
- 👤 Masakazu Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:21
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B32B17/10009; B32B17/10036; B32B17/10082; B32B17/1011; B32B17/10165; B32B17/10174; B32B17/10339; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/095; C03C4/00; C03C4/02; C03C4/08; C03C4/082; C03C4/085; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904; Y10S501/905
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
177 words
A green-colored infrared and ultraviolet ray absorbing glass comprising as essential components, on a weight basis, 68-72% of SiO 2 , 1.6-3.0% of Al 2 O 3 , 8.5-11.0% of CaO, 2.0-4.2% of MgO, 12.0-16.0% of Na 2 O, 0.5-3.0% of K 2 O, 0.08-0.30% of SO 3 , 0.58-0.80% of total iron expressed as Fe 2 O 3 , 0.10-0.60% of CeO 2 , 0.10-0.40% of TiO 2 and 5-350 ppm of MnO, with provisos that the total of said essential ingredients amounts to at least 98 wt % of the glass, that the total amount of SiO 2 , Al 2 O 3 and TiO 2 is from 70.0 to 74.0%, that the total amount CaO and MgO is from 12.0 to 15.0%, that the total amount of Na 2 O and K 2 O is from 13.0 to 17.0% and that said total iron includes ferrous iron and ferric iron, the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40 to 0.70.
Claim 2
Dependent Claim
177 words
A green-colored infrared and ultraviolet ray absorbing glass comprising as essential components, on a weight basis, 68-72% of SiO 2 , 1.6-3.0% of Al 2 O 3 , 8.5-11.0% of CaO, 2.0-4.2% of MgO, 12.0-16.0% of Na 2 O, 0.5-3.0% of K 2 O, 0.08-0.30% of SO 3 , 0.58-0.80% of total iron expressed as Fe 2 O 3 , 0.10-0.60% of CeO 2 , 0.10-0.40% of TiO 2 and 5-350 ppm of MnO, with provisos that the total of said essential ingredients amounts to at least 98 wt % of the glass, that the total amount of SiO 2 , Al 2 O 3 and TiO 2 is from 70.0 to 74.0%, that the total amount CaO and MgO is from 12.0 to 15.0%, that the total amount of Na 2 O and K 2 O is from 13.0 to 17.0% and that said total iron includes ferrous iron and ferric iron, the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40 to 0.70.
Claim 3
Dependent Claim
31 words
A glass according to claim 1, wherein the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.45 to 0.70.
Claim 4
Dependent Claim
24 words
A glass according to claim 2, wherein said weight ratio of ferrous iron to ferric iron is in the range from 0.50 to 0.65.
Claim 5
Dependent Claim
29 words
A glass according to claim 1, wherein the amount of said total iron expressed as Fe 2 O 3 is in the range from 0.60 to 0.71 wt %.
Claim 6
Dependent Claim
40 words
A glass according to claim 4, wherein the amount of said CeO 2 is in the range from 0.2 to 0.35 wt % and the amount of said TiO 2 is in the range from 0.1 to 0.2 wt %.
Claim 7
Dependent Claim
23 words
A glass according to claim 1, wherein the amount of said SO 3 is in the range from 0.10 to 0.18 wt %.
Claim 8
Dependent Claim
62 words
A glass according to claim 1, wherein the glass at a thickness of 5 mm is not lower than 67% in visible light transmittance using the standard illuminant A, from 30 to 47% in total solar radiation transmittance, from 7 to 15% in ultraviolet radiation transmittance, from 505 to 518 nm in dominant wavelength and not higher than 5.5 in excitation purity.
Claim 9
Dependent Claim
178 words
A green-colored infrared and ultraviolet ray absorbing glass comprising as essential components, on a weight basis, 68-72% of SiO 2 , 1.6-3.0% of Al 2 O 3 , 8.5-11.0% of CaO, 2.0-4.2% of MgO, 12.0-16.0% of Na 2 O, 0.5-3.0% of K 2 O , 0.8-0.30% of SO 3 , 0.65-0.75% of total iron expressed as Fe 2 O 3 , 0.20-0.35% of CeO 2 , 0.10-0.20% of TiO 2 and 5-300 ppm of MnO, with provisos that the total of said essential ingredients amounts to at least 98 wt % of the glass, that the total amount of SiO 2 , Al 2 O 3 and TiO 2 is from 70.0 to 74.0%, that the total amount CaO and MgO is from 12.0 to 15.0%, that the total amount of Na 2 O and K 2 O is from 13.0 to 17.0% and that said total iron includes ferrous iron and ferric iron, the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40 to 0.70.
Claim 10
Dependent Claim
178 words
A green-colored infrared and ultraviolet ray absorbing glass comprising as essential components, on a weight basis, 68-72% of SiO 2 , 1.6-3.0% of Al 2 O 3 , 8.5-11.0% of CaO, 2.0-4.2% of MgO, 12.0-16.0% of Na 2 O, 0.5-3.0% of K 2 O , 0.8-0.30% of SO 3 , 0.65-0.75% of total iron expressed as Fe 2 O 3 , 0.20-0.35% of CeO 2 , 0.10-0.20% of TiO 2 and 5-300 ppm of MnO, with provisos that the total of said essential ingredients amounts to at least 98 wt % of the glass, that the total amount of SiO 2 , Al 2 O 3 and TiO 2 is from 70.0 to 74.0%, that the total amount CaO and MgO is from 12.0 to 15.0%, that the total amount of Na 2 O and K 2 O is from 13.0 to 17.0% and that said total iron includes ferrous iron and ferric iron, the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40 to 0.70.
Claim 11
Dependent Claim
31 words
A glass according to claim 8, wherein the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.45 to 0.70.
Claim 12
Dependent Claim
176 words
A green-colored infrared and ultraviolet ray absorbing glass comprising as essential components, on a weight basis, 68-72% of SiO 2 , 1.6-3.0% of Al 2 O 3 , 8.5-11.0% of CaO, 2.0-4.2% of MgO, 12.0-16.0% of Na 2 O, 0.5-3.0% of K 2 O, 0.08-0.30% of SO 3 , 0.58-0.65% of total iron expressed as Fe 2 O 3 , 0.10-0.50% of CeO 2 , 0.10-0.40% of TiO 2 and 5-350 ppm of MnO, with provisos that the total of said essential ingredients amounts to at least 98 wt % of the glass, that the total amount of SiO 2 , Al 2 O 3 and TiO 2 is from 70.0 to 74.0%, that the total amount CaO and MgO is from 12.0 to 15.0%, that the total amount of Na 2 O and K 2 O from 13.0 to 17.0% and that said total iron includes ferrous iron and ferric iron, the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40 to 0.70.
Claim 13
Dependent Claim
176 words
A green-colored infrared and ultraviolet ray absorbing glass comprising as essential components, on a weight basis, 68-72% of SiO 2 , 1.6-3.0% of Al 2 O 3 , 8.5-11.0% of CaO, 2.0-4.2% of MgO, 12.0-16.0% of Na 2 O, 0.5-3.0% of K 2 O, 0.08-0.30% of SO 3 , 0.58-0.65% of total iron expressed as Fe 2 O 3 , 0.10-0.50% of CeO 2 , 0.10-0.40% of TiO 2 and 5-350 ppm of MnO, with provisos that the total of said essential ingredients amounts to at least 98 wt % of the glass, that the total amount of SiO 2 , Al 2 O 3 and TiO 2 is from 70.0 to 74.0%, that the total amount CaO and MgO is from 12.0 to 15.0%, that the total amount of Na 2 O and K 2 O from 13.0 to 17.0% and that said total iron includes ferrous iron and ferric iron, the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40 to 0.70.
Claim 14
Dependent Claim
31 words
A glass according to claim 10, wherein the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.45 to 0.70.
Claim 15
Dependent Claim
24 words
A glass according to claim 11, wherein said weight ratio of ferrous iron to ferric iron is in the range from 0.50 to 0.65.
Claim 16
Dependent Claim
177 words
A green-colored infrared and ultraviolet ray absorbing glass comprising as essential components, on a weight basis, 68-72% of SiO 2 , 1.6-3.0% of Al 2 O 3 , 8.5-11.0% of CaO, 2.0-4.2% of MgO, 12.0-16.0% of Na 2 O, 0.5-3.0% of K 2 O, 0.08-0.30% of SO 3 , 0.65-0.80% of total iron expressed as Fe 2 O 3 , 0.35-0.60% of CeO 2 , 0.15-0.40% of TiO 2 and 5-350 ppm of MnO, with provisos that the total of said essential ingredients amounts to at least 98 wt % of the glass, that the total amount of SiO 2 , Al 2 O 3 and TiO 2 is from 70.0 to 74.0%, that the total amount CaO and MgO is from 12.0 to 15.0%, that the total amount of Na 2 O and K 2 O is from 13.0 to 17.0% and that said total iron includes ferrous iron and ferric iron, the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40 to 0.70.
Claim 17
Dependent Claim
177 words
A green-colored infrared and ultraviolet ray absorbing glass comprising as essential components, on a weight basis, 68-72% of SiO 2 , 1.6-3.0% of Al 2 O 3 , 8.5-11.0% of CaO, 2.0-4.2% of MgO, 12.0-16.0% of Na 2 O, 0.5-3.0% of K 2 O, 0.08-0.30% of SO 3 , 0.65-0.80% of total iron expressed as Fe 2 O 3 , 0.35-0.60% of CeO 2 , 0.15-0.40% of TiO 2 and 5-350 ppm of MnO, with provisos that the total of said essential ingredients amounts to at least 98 wt % of the glass, that the total amount of SiO 2 , Al 2 O 3 and TiO 2 is from 70.0 to 74.0%, that the total amount CaO and MgO is from 12.0 to 15.0%, that the total amount of Na 2 O and K 2 O is from 13.0 to 17.0% and that said total iron includes ferrous iron and ferric iron, the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.40 to 0.70.
Claim 18
Dependent Claim
31 words
A glass according to claim 13, wherein the weight ratio of said ferrous iron to said ferric iron, Fe 2+ /Fe 3+ , is in the range from 0.45 to 0.70.
Claim 19
Dependent Claim
24 words
A glass according to claim 14, wherein said weight ratio of ferrous iron to ferric iron is in the range from 0.50 to 0.65.
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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) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |