US3852079A
Expired / Lapsed
US
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Bao-cao-al{11 o{11 {11 glass compositions
Assignee: Corning Glass Works
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Filing: 1972-10-20
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Granted: 1974-12-03
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Expires: 1992-10-20
Abstract
Abstract Glasses in the BaO-CaO-Al2O3 composition system useful in the manufacture of refractory glass fibers and wools for insulation and metal casting applications wherein silica-containing wools and fibers pose a health hazard are described.
Inventors
- 👤 R Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:29
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/125; C03C13/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
32 words
A COMPOSITION FOR A GLASS WHICH IS COMPOSED, IN MOLE PERCENT ON THE OXIDE BASIS OF BAO, CAO AND AL2O3 IN PROPERTIONS FALLING WITHIN THE AREA OR ALONG THE BOUNDARIES OF THE
Claim 2
Dependent Claim
32 words
A COMPOSITION FOR A GLASS WHICH IS COMPOSED, IN MOLE PERCENT ON THE OXIDE BASIS OF BAO, CAO AND AL2O3 IN PROPERTIONS FALLING WITHIN THE AREA OR ALONG THE BOUNDARIES OF THE
Claim 3
Dependent Claim
48 words
A composition according to claim 1 wherein BaO is present in an amount ranging from 4 to 18 mole percent, CaO is present in an amount ranging from 42 to 54 mole percent, and Al2 O3 is present in an amount ranging from 32 to 42 mole percent.
Claim 4
Dependent Claim
48 words
A composition according to claim 1 wherein BaO is present in an amount ranging from 0 to 7 mole percent, CaO is present in an amount ranging from 54 to 61 mole percent, and Al2 O3 is present in an amount ranging from 39 to 42 mole percent.
Claim 5
Dependent Claim
45 words
A fibrous glass which is composed, in mole percent on the oxide basis, of BaO, CaO and Al2O3 in proportions falling within the area or along the boundaries of the polygon ABCDEFGA shown in the BaO-CaO-Al2O3 ternary composition diagram comprising FIG. 1 of the DRAWING.
Claim 6
Dependent Claim
45 words
A fibrous glass which is composed, in mole percent on the oxide basis, of BaO, CaO and Al2O3 in proportions falling within the area or along the boundaries of the polygon ABCDEFGA shown in the BaO-CaO-Al2O3 ternary composition diagram comprising FIG. 1 of the DRAWING.
Claim 7
Dependent Claim
48 words
A fibrous glass according to claim 4 wherein BaO is present in an amount ranging from 4 to 18 mole percent, CaO is present in an amount ranging from 42 to 54 mole percent, and Al2O3 is present in an amount ranging from 32 to 42 mole percent.
Claim 8
Dependent Claim
48 words
A fibrous glass according to claim 4 wherein BaO is present in an amount ranging from 0 to 7 mole percent, CaO is present in an amount ranging from 54 to 61 mole percent, and Al2O3 is present in an amount ranging from 39 to 42 mole percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |