US4857489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten aluminum resistant ceramic fiber composition
Assignee: AP Green Industries Inc
•
Filing: 1985-11-22
•
Granted: 1989-08-15
•
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 12:58
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.
References Cited (Backward Citations)
US2051279A
Cited
US3078173A
Cited
US3294562A
Cited
US3754948A
Cited
US4174331A
Cited
US4248752A
Cited
SU575338A1
Cited
US4126474A
Cited
US4257812A
Cited
US4334931A
Cited
EP0087762A1
Cited
US4510253A
Cited
GB2149772A
Cited
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 |