US3923534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold-setting refractory compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-05-14
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Granted: 1975-12-02
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Expires: 1993-05-14
Abstract
Abstract A cold setting refractory composition comprises a water-soluble aluminum phosphate binding agent, refractory filler and, as setting agent, magnesia of low reactivity.
Inventors
- 👤 John Edward Cassidy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:54
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
93 words
A COLD-SETTING REFRACTORY COMPOSITION COMPRISING WATER, REFRACTORY FILLER, A WATER-SOLUBLE COMPLEX ALUMINUM PHOSPHATE BINDING AGENT CONTAINING ALUMINA AND PHOSPHATE IN A MOLAR RATIO OF AL:P OF SUBSTANTIALLY 1:1 AND THE ANION OF A CARBOXYLIC ACID OR OF A MINERAL ACID OTHER THAN AN OXYPHOSPHORUS ACID AND, AS SETTING AGENT, MAGNESIA OF LOW REACTIVITY, THE RATIO OF MAGNESIA TO COMPLEX ALUMINUM PHOSPHATE BINDING AGENT IN THE COMPOSITION BEING IN THE RANGE 1:200 TO 1:1 BY WEIGHT AND THE BINDING AGENT PRESENT IN A PROPORTION OF 1 TO 25% BY WEIGHT OF THE REFRACTORY FILLER.
Claim 2
Dependent Claim
93 words
A COLD-SETTING REFRACTORY COMPOSITION COMPRISING WATER, REFRACTORY FILLER, A WATER-SOLUBLE COMPLEX ALUMINUM PHOSPHATE BINDING AGENT CONTAINING ALUMINA AND PHOSPHATE IN A MOLAR RATIO OF AL:P OF SUBSTANTIALLY 1:1 AND THE ANION OF A CARBOXYLIC ACID OR OF A MINERAL ACID OTHER THAN AN OXYPHOSPHORUS ACID AND, AS SETTING AGENT, MAGNESIA OF LOW REACTIVITY, THE RATIO OF MAGNESIA TO COMPLEX ALUMINUM PHOSPHATE BINDING AGENT IN THE COMPOSITION BEING IN THE RANGE 1:200 TO 1:1 BY WEIGHT AND THE BINDING AGENT PRESENT IN A PROPORTION OF 1 TO 25% BY WEIGHT OF THE REFRACTORY FILLER.
Claim 3
Dependent Claim
16 words
A composition as claimed in claim 1 wherein the complex phosphate contains a mineral acid anion.
Claim 4
Dependent Claim
14 words
A composition as claimed in claim 2 wherein the complex phosphate contains chloride ion.
Claim 5
Dependent Claim
13 words
A composition as claimed in claim 1 wherein ground fused magnesia is used.
Claim 6
Dependent Claim
15 words
A composition as claimed in claim 1 wherein hard-burnt natural or precipitated magnesia is used.
Claim 7
Dependent Claim
26 words
A composition as claimed in claim 1 in which the ratio of magnesia to complex aluminum phophate binding agent is in the range 1:50 to 1:3.
Claim 8
Dependent Claim
21 words
A composition as claimed in claim 1 in which the magnesia has a surface area of less than 2 square metres/gram.
Claim 9
Dependent Claim
16 words
A composition as claimed in claim 1 in which the magnesia is at least 98% pure.
Claim 10
Dependent Claim
89 words
A dry powder composition comprising a solid water-soluble complex aluminum phosphate binding agent containing aluminum and phosphate in a molar ratio of Al:P of substantially 1:1 and the anion of a carboxylic acid or of a mineral acid other than an oxyphosphorous acid, and magnesia of low reactivity, the ratio of magnesia to complex aluminum phosphate in the composition being in the range 1:200 to 1:1 by weight, the dry powder composition providing, on the addition of water and refractory filler, a cold-setting composition as claimed in claim 1.
Claim 11
Dependent Claim
20 words
A composition as claimed in claim 9 wherein the magnesia has a surface area of less than 2 square metres/gram.
Claim 12
Dependent Claim
15 words
A composition as claimed in claim 9 wherein the magnesia is at least 98% pure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |