Patent US5013487A successfully refreshed from Google Patents.
US5013487A
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Infrared radiation absorbing glue glass composition
Assignee: Pilkington North America Inc
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Filing: 1989-10-10
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Granted: 1991-05-07
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Expires: 2009-10-10
Abstract
Abstract Blue-colored, infrared radiation absorbing glass compositions are prepared by the addition of zinc sulfide and zinc oxide to glass compositions containing iron. The zinc sulfide acts as a reducing agent, to maintain a portion of the iron in the ferrous state, and the zinc oxide prevents amber coloration of the glass which would otherwise occur due to the addition of the zinc sulfide to the glass batch.
Inventors
- 👤 J. Joseph Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:40
CPC Classifications
F; F21; F21V; F21V9/00; F21V9/04; B; B60; B60J; B60J1/00; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/078; C03C3/083; C03C3/085; C03C3/087; C03C4/00; C03C4/02; C03C4/08; C03C4/082
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A blue-colored, infrared radiation absorbing glass composition, comprising: (A) from about 68 to about 74 weight percent SiO 2 ; (B) from about 11 to about 14 weight percent Na 2 O; (C) from about 0 to about 1 weight percent K 2 O; (D) from about 1.5 to about 5 weight percent MgO; (E) from about 6 to about 13 weight percent CaO; (F) from about 0 to about 3 weight percent Al 2 O 3 ; (G) from about 0 to about 0.5 weight percent TiO 2 ; (H) from about 0 3 to about 0.7 weight percent Fe 2 O 3 ; (I) from about 0 to about 0.6 weight percent SnO 2 ; (J) from about 0.5 to about 1.2 weight percent ZnO; and (K) from about 0.15 to about 0 4 weight percent SO 3 --.
Claim 2
Dependent Claim
141 words
A blue-colored, infrared radiation absorbing glass composition, comprising: (A) from about 68 to about 74 weight percent SiO 2 ; (B) from about 11 to about 14 weight percent Na 2 O; (C) from about 0 to about 1 weight percent K 2 O; (D) from about 1.5 to about 5 weight percent MgO; (E) from about 6 to about 13 weight percent CaO; (F) from about 0 to about 3 weight percent Al 2 O 3 ; (G) from about 0 to about 0.5 weight percent TiO 2 ; (H) from about 0 3 to about 0.7 weight percent Fe 2 O 3 ; (I) from about 0 to about 0.6 weight percent SnO 2 ; (J) from about 0.5 to about 1.2 weight percent ZnO; and (K) from about 0.15 to about 0 4 weight percent SO 3 --.
Claim 3
Dependent Claim
141 words
A blue colored, infrared radiation absorbing glass composition, comprising: (A) from about 70 to about 73 weight percent SiO 2 ; (B) from about 12 to about 14 weight percent Na 2 O; (C) from about 0 to about 1 weight percent K 2 O; (D) from about 3 to about 4 weight percent MgO; (E) from about 6 to about 10 weight percent CaO; (F) from about 0 to about 2 weight percent Al 2 O 3 ; (G) from about 0 to about 0.5 weight percent TiO 2 ; (H) from 3 to about 0.65 weight percent Fe 2 O 3 ; (I) from about 0.1 to about 0.6 weight percent SnO 2 ; (J) from about 0 6 to about 1.2 weight percent ZnO; and (K) from about 0 2 to about 0.35 weight percent SO 3 --.
Claim 4
Dependent Claim
141 words
A blue colored, infrared radiation absorbing glass composition, comprising: (A) from about 70 to about 73 weight percent SiO 2 ; (B) from about 12 to about 14 weight percent Na 2 O; (C) from about 0 to about 1 weight percent K 2 O; (D) from about 3 to about 4 weight percent MgO; (E) from about 6 to about 10 weight percent CaO; (F) from about 0 to about 2 weight percent Al 2 O 3 ; (G) from about 0 to about 0.5 weight percent TiO 2 ; (H) from 3 to about 0.65 weight percent Fe 2 O 3 ; (I) from about 0.1 to about 0.6 weight percent SnO 2 ; (J) from about 0 6 to about 1.2 weight percent ZnO; and (K) from about 0 2 to about 0.35 weight percent SO 3 --.
Claim 5
Dependent Claim
9 words
A glazing prepared from the composition of claim 1.
Claim 6
Dependent Claim
9 words
A glazing prepared from the composition of claim 2.
References Cited (Backward Citations)
US2636420A
Cited
US2755212A
Cited
US3326703A
Cited
US3806349A
Cited
US3649311A
Cited
US3844796A
Cited
US3652303A
Cited
US3779733A
Cited
US4106946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |