US4396722A
Expired / Lapsed
US
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Wool glass composition
Assignee: Owens Corning
•
Filing: 1982-04-05
•
Granted: 1983-08-02
•
Expires: 2002-04-05
Abstract
Abstract Fiberizable glass compositions are disclosed. The glass compositions are boron-free wool glasses which are useful as insulation. The glass batch used to prepare these glass compositions contains high amounts of iron oxide.
Inventors
- 👤 Charles F. Rapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:32
CPC Classifications
C; C03; C03C; C03C13/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
84 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 56.0-64.0
Al.sub.2 O.sub.3 3.0-6.0
Na.sub.2 O 16.0-22.0
K.sub.2 O 0.0-2.0
CaO 3.0-14.0
MgO 1.0-7.0
FeO + Fe.sub.2 O.sub.3
4.1-10.0
______________________________________ and up to several percent of each of other substituents including TiO 2 , ZnO, SO 3 , Li 2 O, MnO, SrO and BaO having a viscosity of log n=2.5 at a temperature of about 1232° C. or less and a liquidus temperature of about 1094° C. or less.
Claim 2
Dependent Claim
84 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 56.0-64.0
Al.sub.2 O.sub.3 3.0-6.0
Na.sub.2 O 16.0-22.0
K.sub.2 O 0.0-2.0
CaO 3.0-14.0
MgO 1.0-7.0
FeO + Fe.sub.2 O.sub.3
4.1-10.0
______________________________________ and up to several percent of each of other substituents including TiO 2 , ZnO, SO 3 , Li 2 O, MnO, SrO and BaO having a viscosity of log n=2.5 at a temperature of about 1232° C. or less and a liquidus temperature of about 1094° C. or less.
Claim 3
Dependent Claim
83 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 57.0-64.0
Al.sub.2 O.sub.3
3.0-5.0
Na.sub.2 O 16.0-20.0
K.sub.2 O 0.0-1.5
CaO 4.0-10.0
MgO 1.5-6.5
FeO + Fe.sub.2 O.sub.3
4.1-8.0
______________________________________ and up to several percent each of other substituents including TiO 2 , ZnO, So 3 , Li 2 O, MnO, SrO and BaO having a viscosity of log n=2.5 at a temperature of about 1232° C. or less and a liquidus temperature of about 1094° C. or less.
Claim 4
Dependent Claim
83 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 57.0-64.0
Al.sub.2 O.sub.3
3.0-5.0
Na.sub.2 O 16.0-20.0
K.sub.2 O 0.0-1.5
CaO 4.0-10.0
MgO 1.5-6.5
FeO + Fe.sub.2 O.sub.3
4.1-8.0
______________________________________ and up to several percent each of other substituents including TiO 2 , ZnO, So 3 , Li 2 O, MnO, SrO and BaO having a viscosity of log n=2.5 at a temperature of about 1232° C. or less and a liquidus temperature of about 1094° C. or less.
Claim 5
Dependent Claim
33 words
Boron-free glass fibers consisting of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 61.0
Al.sub.2 O.sub.3
4.5
Na.sub.2 O 19.7
K.sub.2 O 0.3
CaO 7.6
MgO 1.6
FeO + Fe.sub.2 O.sub.3
4.2
______________________________________
Claim 6
Dependent Claim
33 words
Boron-free glass fibers consisting of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 61.0
Al.sub.2 O.sub.3
4.5
Na.sub.2 O 19.7
K.sub.2 O 0.3
CaO 7.6
MgO 1.6
FeO + Fe.sub.2 O.sub.3
4.2
______________________________________
Claim 7
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 61.1
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 17.7
K.sub.2 O 0.3
CaO 7.2
MgO 4.5
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 8
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 61.1
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 17.7
K.sub.2 O 0.3
CaO 7.2
MgO 4.5
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 9
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 61.0
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 19.7
K.sub.2 O 0.3
CaO 5.9
MgO 3.7
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 10
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 61.0
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 19.7
K.sub.2 O 0.3
CaO 5.9
MgO 3.7
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 11
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 61.1
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 21.7
K.sub.2 O 0.3
CaO 4.7
MgO 2.9
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 12
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 61.1
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 21.7
K.sub.2 O 0.3
CaO 4.7
MgO 2.9
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 13
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 59.4
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 17.7
K.sub.2 O 0.3
CaO 8.1
MgO 5.1
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 14
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 59.4
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 17.7
K.sub.2 O 0.3
CaO 8.1
MgO 5.1
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 15
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 59.4
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 19.7
K.sub.2 O 0.3
CaO 6.9
MgO 4.3
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 16
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 59.4
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 19.7
K.sub.2 O 0.3
CaO 6.9
MgO 4.3
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 17
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 59.4
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 21.7
K.sub.2 O 0.3
CaO 5.7
MgO 3.5
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
Claim 18
Dependent Claim
34 words
Boron-free glass fibers consisting essentially of, by weight: ______________________________________
Ingredients Weight Percent
______________________________________
SiO.sub.2 59.4
Al.sub.2 O.sub.3
4.4
Na.sub.2 O 21.7
K.sub.2 O 0.3
CaO 5.7
MgO 3.5
FeO + Fe.sub.2 O.sub.3
4.1
______________________________________
References Cited (Backward Citations)
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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) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |