Patent US5372977A successfully refreshed from Google Patents.
US5372977A
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Glass composition for the manufacture of glazings
Assignee: Saint Gobain Glass France SAS
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Filing: 1993-12-22
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Granted: 1994-12-13
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Expires: 2013-12-22
Abstract
Abstract Soda-lime-silica glass containing iron and fluorine has a high total light transmission factor while absorbing infrared radiation. This glass is useful in making glazings for automotive uses.
Inventors
- 👤 Pedro Mazon-Ramos
- 👤 Pedro Alvarez-Casariego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:15
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/08; C03C4/082; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C3/095; C03C4/085
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
35 words
A soda-lime-silica glass composition comprising about 0.3-1.0 wt. % total iron, expressed as Fe 2 O 3 , at least 35% of said iron being in the FeO form, and about 0.5-2.8 wt. % fluorine.
Claim 2
Dependent Claim
35 words
A soda-lime-silica glass composition comprising about 0.3-1.0 wt. % total iron, expressed as Fe 2 O 3 , at least 35% of said iron being in the FeO form, and about 0.5-2.8 wt. % fluorine.
Claim 3
Dependent Claim
25 words
The glass composition of claim 1, wherein the total iron content is about 0.3-0.6 wt. %, and the fluorine content is about 0.5-1.5 wt. %.
Claim 4
Dependent Claim
25 words
The glass composition of claim 1, wherein the total iron content is about 0.5-1.0 wt. %, and the fluorine content is about 1.0-2.5 wt. %.
Claim 5
Dependent Claim
20 words
The glass composition of claim 2, further comprising Ce 2 O 3 in an amount up to 1.6 wt. %.
Claim 6
Dependent Claim
20 words
The glass composition of claim 3, further comprising Ce 2 O 3 in an amount up to 1.6 wt. %.
Claim 7
Dependent Claim
15 words
The glass composition of claim 4, comprising 0.3-0.8 wt. % Ce 2 O 3 .
Claim 8
Dependent Claim
15 words
The glass composition of claim 5, comprising 0.3-0.8 wt. % Ce 2 O 3 .
Claim 9
Dependent Claim
11 words
A glass sheet made from the glass composition of claim 1.
Claim 10
Dependent Claim
13 words
The glass sheet of claim 8 having a thickness of about 0.8-10 mm.
Claim 11
Dependent Claim
30 words
The glass sheet of claim 8, wherein said glass sheet has a total light transmission factor under illuminant A of at least 70% and a thickness between about 0.8-6 mm.
Claim 12
Dependent Claim
21 words
A glazing containing multiple glass sheets wherein at least one of said glass sheets is the glass sheet of claim 8.
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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) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |