US4522926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum resistant refractory composition
Assignee: Premier Refractories and Chemicals Inc
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Filing: 1983-03-10
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Granted: 1985-06-11
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Expires: 2003-03-10
Abstract
Abstract A refractory composition for use in contact with molten aluminum alloys containing a refractory aggregate, a binder and 9Al 2 O 3 .2B 2 O 3 . The aluminum borate may be of the type produced as a by-product in the production of ferro-boron alloys and known as aluminum boron slag.
Inventors
- 👤 Frank T. Felice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:44
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/653; C04B35/657; C04B35/01; C04B35/03; C04B35/04; C04B35/043; C04B35/047; C04B35/10; C04B35/101; C04B35/66; C04B2111/00; C04B2111/00474; C04B2111/0087; C04B2111/00879; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3217; C04B2235/3222; C04B2235/3231; C04B2235/3241; C04B2235/34; C04B2235/3418; C04B2235/3427; C04B2235/3463; C04B2235/70; C04B2235/96; C04B2235/9669; C04B2235/9676
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
A refractory composition resistant to attack by molten aluminum alloys consisting essentially of: a. 45 to 90 weight percent refractory aggregate particles compatible with the selected refractory binder, b. 3 to 40 weight percent refractory binder selected from the group consisting of calcium aluminate cement, aluminum phosphate, phosphoric acid, alkali silicates and clay, and c. an additive consisting essentially of crystalline 9Al 2 O 3 .2B 2 O 3 such that the refractory composition contains 1 to 12 percent 9Al 2 O 3 .2B 2 O 3 by weight.
Claim 2
Dependent Claim
89 words
A refractory composition resistant to attack by molten aluminum alloys consisting essentially of: a. 45 to 90 weight percent refractory aggregate particles compatible with the selected refractory binder, b. 3 to 40 weight percent refractory binder selected from the group consisting of calcium aluminate cement, aluminum phosphate, phosphoric acid, alkali silicates and clay, and c. an additive consisting essentially of crystalline 9Al 2 O 3 .2B 2 O 3 such that the refractory composition contains 1 to 12 percent 9Al 2 O 3 .2B 2 O 3 by weight.
Claim 3
Dependent Claim
33 words
A refractory composition as recited in claim 1 wherein said refractory particles are selected from the group consisting of chrome ore, bauxite, tabular alumina, silica, spinel, magnesia-chrome, mullite, and expanded clay and shale.
Claim 4
Dependent Claim
15 words
A refractory composition as recited in claim 1 wherein said additive comprises aluminum boron slag.
Claim 5
Dependent Claim
16 words
A refractory composition as recited in claim 3 wherein said aluminum boron slag is synthetically produced.
Claim 6
Dependent Claim
28 words
A refractory composition as recited in claim 3 wherein said aluminum boron slag comprises primarily aluminum oxide with at least about 4 percent B 2 O 3 .
Claim 7
Dependent Claim
33 words
A refractory composition as recited in claim 3 wherein said refractory particles are selected from the group consisting of chrome ore, bauxite, tabular alumina, silica, spinel, magnesia-chrome, mullite, and expanded clay and shale.
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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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |