US4246035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High purity mortar suitable for bonding refractory brick
Assignee: Alcoa Corp
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Filing: 1979-12-26
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Granted: 1981-01-20
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Expires: 1999-12-26
Abstract
Abstract A high purity mortor suitable for bonding refractory brick is disclosed. The mortar, which is resistant to attack by molten aluminum, comprises 43 to 89 wt.% alumina aggregate, 10 to 45 wt.% calcium aluminate cement, 0.5 to 10 wt.% zinc borosilicate and 0.1 to 1.5 wt.% boric acid.
Inventors
- 👤 George Maczura
- 👤 Raymond P. Heilich
- 👤 Frank J. Rohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:03
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B35/00; C04B35/01; C04B35/10; C04B35/101; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/66; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/085; C04B2111/00; C04B2111/00474; C04B2111/00637; C04B2111/0087; C04B2111/00879; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/801; Y10S505/809
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
A high purity mortar suitable for binding refractory brick, the mortar being resistant to attack by molten aluminum and comprising: (a) 43 to 89 wt.% alumina; (b) 10 to 45 wt.% calcium aluminate cement; (c) 0.5 to 10 wt.% zinc borosilicate; and (d) 0.1 to 1.5 wt.% boric acid.
Claim 2
Dependent Claim
49 words
A high purity mortar suitable for binding refractory brick, the mortar being resistant to attack by molten aluminum and comprising: (a) 43 to 89 wt.% alumina; (b) 10 to 45 wt.% calcium aluminate cement; (c) 0.5 to 10 wt.% zinc borosilicate; and (d) 0.1 to 1.5 wt.% boric acid.
Claim 3
Dependent Claim
19 words
The mortar in accordance with claim 1 wherein the alumina is in the range of 54 to 74 wt.%.
Claim 4
Dependent Claim
20 words
The mortar in accordance with claim 1 wherein the calcium aluminate is in the range of 25 to 40 wt.%.
Claim 5
Dependent Claim
20 words
The mortar in accordance with claim 1 wherein the zinc borosilicate is in the range of 1.0 to 5.0 wt.%.
Claim 6
Dependent Claim
20 words
The mortar in accordance with claim 1 wherein the boric acid is in the range of 0.2 to 0.8 wt.%.
Claim 7
Dependent Claim
49 words
A high purity mortar suitable for binding refractory brick, the mortar being resistant to attack by molten aluminum and comprising: (a) 54 to 74 wt.% alumina; (b) 25 to 40 wt.% calcium aluminate cement; (c) 1.0 to 5.0 wt.% zinc borosilicate; and (d) 0.2 to 0.8 wt.% boric acid.
Claim 8
Dependent Claim
49 words
A high purity mortar suitable for binding refractory brick, the mortar being resistant to attack by molten aluminum and comprising: (a) 54 to 74 wt.% alumina; (b) 25 to 40 wt.% calcium aluminate cement; (c) 1.0 to 5.0 wt.% zinc borosilicate; and (d) 0.2 to 0.8 wt.% boric acid.
Claim 9
Dependent Claim
21 words
The mortar in accordance with claim 1 wherein the alumina has a size of not greater than 8 mesh (Tyler Series).
References Cited (Backward Citations)
US4088502A
Cited
US4158568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |