Patent US4857489A successfully refreshed from Google Patents.
US4857489A
Expired / Lapsed
US
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Molten aluminum resistant ceramic fiber composition
Assignee: AP Green Industries Inc
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Filing: 1985-11-22
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Granted: 1989-08-15
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Expires: 2005-11-22
Abstract
Abstract A moldable refractory composition comprising a ceramic alumina-silica fiber, a colloidal silica, an organic adhesive, wollastonite, and a liquid vehicle such as water forms a molten aluminum resistant refractory when dried.
Inventors
- 👤 James M. Bearden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/22; C04B35/71; C04B35/78; C04B35/80
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
46 words
A moldable refractory composition comprising a ceramic fiber, a colloidal silica, wollastonite, an organic adhesive, and a sufficient amount of liquid vehicle to give the composition a putty-like consistency, wherein the wollastonite is from about 3.5% to about 10% of the total weight of the composition.
Claim 2
Dependent Claim
46 words
A moldable refractory composition comprising a ceramic fiber, a colloidal silica, wollastonite, an organic adhesive, and a sufficient amount of liquid vehicle to give the composition a putty-like consistency, wherein the wollastonite is from about 3.5% to about 10% of the total weight of the composition.
Claim 3
Dependent Claim
31 words
The composition of claim 1 wherein the ceramic fiber is from about 8.9% to about 38%, and the colloidal silica is from about 9.8% to about 23% of the total weight.
Claim 4
Dependent Claim
30 words
The composition of claim 2 wherein the adhesive is from about 0.6% to about 2%, and the liquid vehicle is from about 30% to about 65% of the total weight.
Claim 5
Dependent Claim
52 words
The composition of claim 1 wherein it comprises: (a) from about 10% to about 35% ceramic fiber; (b) from about 15% to about 21% colloidal silica; (c) from about 5% to about 9% wollastonite; (d) from about 0.6% to about 2% adhesive; and (e) from about 35% to about 60% liquid vehicle.
Claim 6
Dependent Claim
52 words
The composition of claim 1 wherein it comprises: (a) from about 12% to about 25% ceramic fiber; (b) from about 16% to about 20% colloidal silica; (c) from about 5% to about 9% wollastonite; (d) from about 0.6% to about 2% adhesive; and (e) from about 45% to about 60% liquid vehicle.
Claim 7
Dependent Claim
21 words
The composition of claim 4 wherein the adhesive is not more than about 2.4% of the weight of the liquid vehicle.
Claim 8
Dependent Claim
26 words
A molten aluminum-resistant refractory comprising a ceramic fiber, a colloidal silica, and wollastonite, wherein the wollastonite is from about 11.9% to about 15.6% of the composition.
Claim 9
Dependent Claim
26 words
A molten aluminum-resistant refractory comprising a ceramic fiber, a colloidal silica, and wollastonite, wherein the wollastonite is from about 11.9% to about 15.6% of the composition.
Claim 10
Dependent Claim
37 words
The composition of claim 7 wherein it comprises, by weight: (a) from about 25.9 to about 57.1% ceramic fiber; (b) from about 22.3 to about 62.2% colloidal silica; and (c) from about 11.9 to about 15.6% wollastonite.
Claim 11
Dependent Claim
20 words
The composition of claim 8 wherein it comprises about 35.1% ceramic fiber, about 50% colloidal silica, and about 14.9% wollastonite.
Claim 12
Dependent Claim
20 words
The composition of claim 8 wherein it comprises about 57.1% ceramic fiber, about 28.6% colloidal silica, and about 14.3% wollastonite.
Claim 13
Dependent Claim
18 words
The composition of claim 1 wherein it comprises about 13.8% ceramic fiber and about 5.9% wollastonite, by weight.
Claim 14
Dependent Claim
18 words
The composition of claim 1 wherein it comprises about 34.8% ceramic fiber and about 8.7% wollastonite, by weight.
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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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |