US4177077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass composition for fiberization
Assignee: Johns Manville Corp
•
Filing: 1978-09-19
•
Granted: 1979-12-04
•
Expires: 1998-09-19
Abstract
Abstract A glass composition having improved working properties and of particular utility for fiberization by the rotary or centrifugal process that does not employ conventional hot gas blast attenuation, into fibers exhibiting improved chemical durability, consisting essentially of: SiO 2 ; CaO; B 2 O 3 ; Na 2 O; Al 2 O 3 ; and ZnO; and small amounts of Fe 2 O 3 , TiO 2 , K 2 O, MgO and SO 3 .
Inventors
- 👤 Lawrence V. Gagin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:09
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C3/093; C03C13/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A glass composition of improved moisture resistance in the form of fibers consisting essentially of by weight: ______________________________________
Parts
______________________________________
SiO.sub.2 54- 57
Al.sub.2 O.sub.3 3- 4
CaO 10- 13
Na.sub.2 O 16- 19
B.sub.2 O.sub.3 9- 12
ZnO 1- 3.5
______________________________________ and having a softening temperature of about 1207° F. to 1221° F., a Liquidus temperature of about 1700° F. to 1740° F., and a temperature at a viscosity of 1000 poises of 1690° F. to 1730° F.
Claim 2
Dependent Claim
79 words
A glass composition of improved moisture resistance in the form of fibers consisting essentially of by weight: ______________________________________
Parts
______________________________________
SiO.sub.2 54- 57
Al.sub.2 O.sub.3 3- 4
CaO 10- 13
Na.sub.2 O 16- 19
B.sub.2 O.sub.3 9- 12
ZnO 1- 3.5
______________________________________ and having a softening temperature of about 1207° F. to 1221° F., a Liquidus temperature of about 1700° F. to 1740° F., and a temperature at a viscosity of 1000 poises of 1690° F. to 1730° F.
Claim 3
Dependent Claim
37 words
A glass composition according to claim 1 consisting essentially of by weight: ______________________________________
Parts
______________________________________
SiO.sub.2 54.5- 57.0
Al.sub.2 O.sub.3 3.3- 3.8
CaO 10.1- 12.2
Na.sub.2 O 16.2- 18.1
B.sub.2 O.sub.3 9.2- 11.1
ZnO 1.2- 1.7
______________________________________
Claim 4
Dependent Claim
75 words
A glass composition of improved moisture resistance in the form of fibers consisting essentially of by weight: ______________________________________
Parts
______________________________________
SiO.sub.2 54.5-55.6
Al.sub.2 O.sub.3
3.4- 3.8
CaO 11.0-12.2
Na.sub.2 O 16.2-18.1
B.sub.2 O.sub.3
9.4-10.0
ZnO 1.2- 1.7
______________________________________ and having a softening temperature of about 1209° F. to 1221° F., a liquidus temperature of about 1700° F. to 1740° F., and a temperature at a viscosity of 1000 poises of 1690° F. to 1730° F.
Claim 5
Dependent Claim
75 words
A glass composition of improved moisture resistance in the form of fibers consisting essentially of by weight: ______________________________________
Parts
______________________________________
SiO.sub.2 54.5-55.6
Al.sub.2 O.sub.3
3.4- 3.8
CaO 11.0-12.2
Na.sub.2 O 16.2-18.1
B.sub.2 O.sub.3
9.4-10.0
ZnO 1.2- 1.7
______________________________________ and having a softening temperature of about 1209° F. to 1221° F., a liquidus temperature of about 1700° F. to 1740° F., and a temperature at a viscosity of 1000 poises of 1690° F. to 1730° F.
Claim 6
Dependent Claim
75 words
A glass composition of improved moisture resistance in the form of fibers consisting essentially of by weight: ______________________________________
Parts
______________________________________
SiO.sub.2 54.8-55.6
Al.sub.2 O.sub.3
3.4- 3.8
CaO 11.3-12.1
Na.sub.2 O 16.7-17.3
B.sub.2 O.sub.3
9.4-10.0
ZnO 1.2- 1.6
______________________________________ and having a softening temperature of about 1209° F. to 1221° F., a Liquidus temperature of about 1700° F. to 1740° F., and a temperature at a viscosity of 1000 poises of 1690° F. to 1730° F.
Claim 7
Dependent Claim
75 words
A glass composition of improved moisture resistance in the form of fibers consisting essentially of by weight: ______________________________________
Parts
______________________________________
SiO.sub.2 54.8-55.6
Al.sub.2 O.sub.3
3.4- 3.8
CaO 11.3-12.1
Na.sub.2 O 16.7-17.3
B.sub.2 O.sub.3
9.4-10.0
ZnO 1.2- 1.6
______________________________________ and having a softening temperature of about 1209° F. to 1221° F., a Liquidus temperature of about 1700° F. to 1740° F., and a temperature at a viscosity of 1000 poises of 1690° F. to 1730° F.
Claim 8
Dependent Claim
70 words
A glass composition according to claim 1 consisting essentially of by weight: ______________________________________
Parts
______________________________________
SiO.sub.2 55.3-57.0
Al.sub.2 O.sub.3
3.6- 3.8
CaO 10.1-10.8
Na.sub.2 O 17.1-17.2
B.sub.2 O.sub.3
9.2-11.1
ZnO 1.3- 1.5
______________________________________ and having a softening temperature of about 1207° F. to 1221° F., a Liquidus temperature of about 1700° F. to 1710° F., and a temperature at a viscosity of 1000 poises of 1700° F. to 1710° F.
Claim 9
Dependent Claim
49 words
A glass composition according to claim 4 comprising by weight: ______________________________________
Parts
______________________________________
SiO.sub.2
55.2
Al.sub.2 O.sub.3
3.6
CaO 11.7
Na.sub.2 O
17.0
B.sub.2 O.sub.3
9.7
ZnO 1.4
Fe.sub.2 O.sub.3
0.08
K.sub.2 O
0.7
MgO 0.4
SO.sub.3
0.2
______________________________________ and having a temperature at 1000 poises of 1730° F.
Claim 10
Dependent Claim
50 words
A glass composition according to claim 3 comprising by weight: ______________________________________
Parts
______________________________________
SiO.sub.2
55.2
Al.sub.2 O.sub.3
3.6
CaO 11.8
Na.sub.2 O
16.5
B.sub.2 O.sub.3
9.7
ZnO 1.4
Fe.sub. 2 O.sub.3
0.05
K.sub.2 O
1.2
MgO 0.3
SO.sub.3
0.2
______________________________________ and having a temperature at 1000 poises of 1730° F.
Claim 11
Dependent Claim
50 words
A glass composition according to claim 3 comprising by weight: ______________________________________
Parts
______________________________________
SiO.sub.2
55.0
Al.sub.2 O.sub.3
3.6
CaO 11.5
Na.sub.2 O
17.8
B.sub.2 O.sub.3
9.8
ZnO 1.5
Fe.sub.2 O.sub.3
0.13
K.sub.2 O
0.4
MgO 0.2
SO.sub.3
0.1
______________________________________ and having a temperature at 1000 poises of about 1710° F.
Claim 12
Dependent Claim
49 words
A glass composition according to claim 3 comprising by weight: ______________________________________
Parts
______________________________________
SiO.sub.2
54.5
Al.sub.2 O.sub.3
3.8
CaO 11.0
Na.sub.2 O
16.3
B.sub.2 O.sub.3
10.0
ZnO 1.5
Fe.sub.2 O.sub.3
0.05
K.sub.2 O
2.7
MgO 0.2
SO.sub.3
0.1
______________________________________ and having a temperature at 1000 poises of 1710° F.
References Cited (Backward Citations)
CA611057A
Cited
US2877124A
Cited
US3085887A
Cited
US3013888A
Cited
US3508939A
Cited
US3513002A
Cited
US3817764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |