Patent US4534283A successfully refreshed from Google Patents.
Patent US4069057A successfully refreshed from Google Patents.
US4069057A
Expired / Lapsed
US
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Monolithic refractory materials
Assignee: Tayca Corp
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Filing: 1976-02-17
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Granted: 1978-01-17
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Expires: 1996-02-17
Abstract
Abstract A monolithic refractory material especially suitable for vibration forming comprising a refractory composition containing silica sol, alumina sol or both as a binder and a water-insoluble or slightly water-soluble phosphate. The refractory material is used for lining receptacles such as a ladle or tundish or a trough or the like for treating molten metals.
Inventors
- 👤 Siro Kamei
- 👤 Kenzo Takeda
- 👤 Mitsunao Takahashi
- 👤 Jiro Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:20
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/01; C04B35/10; C04B35/101; C04B35/14; C04B35/16; C04B35/18; C04B35/6306; C04B35/6316; C04B35/66; C04B2103/00; C04B2103/0004; C04B2103/0021; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/34; C04B2235/3418; C04B2235/3427; C04B2235/3463; C04B2235/38; C04B2235/3817; C04B2235/3826; C04B2235/3852; C04B2235/3873; C04B2235/42; C04B2235/422
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
In a monolithic refractory material comprising a. a refractory composition consisting of a powdery refractory component which does not react with silica sol or alumina sol at room temperature; and b. a binder having a solids content of more than about 5% by weight selected from the group consisting of silica sol, alumina sol or a mixture thereof; the improvement which comprises said material being a thixotropic monolithic refractory material for vibration forming which consists essentially of i. 100 parts by weight of said powdery refractory component; ii. from about 5 to 20 parts by weight of said binder; and iii. from about 0.3 to 3.0 parts by weight of a water-insoluble or slightly water-soluble metal phosphate synthesized at a temperature of from about 230° to about 500° C.
Claim 2
Dependent Claim
129 words
In a monolithic refractory material comprising a. a refractory composition consisting of a powdery refractory component which does not react with silica sol or alumina sol at room temperature; and b. a binder having a solids content of more than about 5% by weight selected from the group consisting of silica sol, alumina sol or a mixture thereof; the improvement which comprises said material being a thixotropic monolithic refractory material for vibration forming which consists essentially of i. 100 parts by weight of said powdery refractory component; ii. from about 5 to 20 parts by weight of said binder; and iii. from about 0.3 to 3.0 parts by weight of a water-insoluble or slightly water-soluble metal phosphate synthesized at a temperature of from about 230° to about 500° C.
Claim 3
Dependent Claim
53 words
The refractory material of claim 1, wherein said water-insoluble or slightly water-soluble phosphate is a phosphate of a metal selected from the group consisting of magnesium, calcium, aluminium, silicon, titanium, zirconium, chromium, molybdenum, tungsten, manganese, iron, cobalt and nickel, a mixture thereof or a complex of at least two of said metal phosphates.
Claim 4
Dependent Claim
19 words
The refractory material of claim 1, wherein said water-insoluble or slightly water-soluble phosphate is aluminum phosphate or titanium phosphate.
Claim 5
Dependent Claim
32 words
The refractor material of claim 1, wherein said powdery, refractory component is selected from the group consisting of silica sand, fused silica, aluminum silicates, boron carbide, silicon nitride, silicon carbide and carbon.
Claim 6
Dependent Claim
35 words
The refractory material of claim 1, wherein the water insoluble or slightly water soluble phosphate is a finely divided material at least about 80% of which consists of particles passing through a 200 mesh sieve.
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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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |