US3561494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Castable silicate compositions, casting methods and articles produced thereby
Assignee: Individual
•
Filing: 1968-03-04
•
Granted: 1971-02-09
•
Expires: 1988-03-04
Abstract
Abstract Castable compositions including soluble or colloidal silicates as binding agent. The composition is cast as an aqueous slurry in a mold coated with a reagent for precipitating the silicate, to prevent penetration of silicates into the mold surface. A lightweight, expandable, refractory tube having excellent resistance to thermal shock is produced.
Inventors
- 👤 Robert J Hackett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:50
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/10; F16L9/14
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
92 words
An article of manufacture, comprising: A. a metal tube; and B. a foamed ceramic body surrounding and bonded to said tube, said ceramic body essentially comprising: 1. 40-67.5 percent mullite; 2. 5-15 percent Si02; 3. 3-5 percent Na20; 4. 0-10 percent perlite; and 5. 0-10 percent clay; said ceramic body having an outer peripheral layer comprising a blend of said ceramic body and an insoluble silicate salt, said insoluble silicate salt resulting from the reaction of calcium stearate and the aqueous silicate of said body to form a substantially nonporous insoluble layer.
Claim 2
Dependent Claim
92 words
An article of manufacture, comprising: A. a metal tube; and B. a foamed ceramic body surrounding and bonded to said tube, said ceramic body essentially comprising: 1. 40-67.5 percent mullite; 2. 5-15 percent Si02; 3. 3-5 percent Na20; 4. 0-10 percent perlite; and 5. 0-10 percent clay; said ceramic body having an outer peripheral layer comprising a blend of said ceramic body and an insoluble silicate salt, said insoluble silicate salt resulting from the reaction of calcium stearate and the aqueous silicate of said body to form a substantially nonporous insoluble layer.
Claim 3
Dependent Claim
3 words
5-15 percent Si02;
Claim 4
Dependent Claim
3 words
5-15 percent Si02;
Claim 5
Dependent Claim
17 words
An article of manufacture as defined in claim 1, wherein said nonporous, insoluble layer comprises polysilicic acid.
Claim 6
Dependent Claim
3 words
14.7 percent Si02;
Claim 7
Dependent Claim
3 words
14.7 percent Si02;
Claim 8
Dependent Claim
3 words
4.2 percent Na20;
Claim 9
Dependent Claim
3 words
4.2 percent Na20;
Claim 10
Dependent Claim
18 words
An article of manufacture as defined in claim 1, wherein said nonporous, insoluble layer comprises a copper salt.
Claim 11
Dependent Claim
3 words
3-5 percent Na20;
Claim 12
Dependent Claim
3 words
3-5 percent Na20;
Claim 13
Dependent Claim
4 words
0-10 percent perlite; and
Claim 14
Dependent Claim
4 words
0-10 percent perlite; and
Claim 15
Dependent Claim
16 words
An article of manufacture as defined in claim 3, wherein said silicate salt comprises calcium silicate.
Claim 16
Dependent Claim
4 words
7.1 percent perlite; and
Claim 17
Dependent Claim
4 words
7.1 percent perlite; and
Claim 18
Dependent Claim
48 words
6.5 percent clay; said ceramic body having an outer peripheral layer comprising a blend of said ceramic body and an insoluble silicate salt, said insoluble silicate salt resulting from the reaction of calcium stearate and the aqueous silicate of said body to form a substantially nonporous insoluble layer.
Claim 19
Dependent Claim
48 words
6.5 percent clay; said ceramic body having an outer peripheral layer comprising a blend of said ceramic body and an insoluble silicate salt, said insoluble silicate salt resulting from the reaction of calcium stearate and the aqueous silicate of said body to form a substantially nonporous insoluble layer.
Claim 20
Dependent Claim
18 words
An article of manufacture as defined in sinc 1, wherein said nonporous, insoluble layer comprises a zinc salt.
Claim 21
Dependent Claim
18 words
An article of manufacture as defined in sinc 1, wherein said nonporous, insoluble layer comprises a zinc salt.
Claim 22
Dependent Claim
48 words
0-10 percent clay; said ceramic body having an outer peripheral layer comprising a blend of said ceramic body and an insoluble silicate salt, said insoluble silicate salt resulting from the reaction of calcium stearate and the aqueous silicate of said body to form a substantially nonporous insoluble layer.
Claim 23
Dependent Claim
48 words
0-10 percent clay; said ceramic body having an outer peripheral layer comprising a blend of said ceramic body and an insoluble silicate salt, said insoluble silicate salt resulting from the reaction of calcium stearate and the aqueous silicate of said body to form a substantially nonporous insoluble layer.
Claim 24
Dependent Claim
14 words
The article defined in claim 1, wherein said ceramic body is cellular in structure.
Claim 25
Dependent Claim
20 words
The article defined in claim 6, wherein said ceramic body contains about 10 to 15 percent entrained gas, by volume.
Claim 26
Dependent Claim
28 words
An article of manufacture, comprising: A. a metal tube; and B. a foamed ceramic body surrounding and bonded to said tube, said ceramic body consisting essentially of about:
Claim 27
Dependent Claim
28 words
An article of manufacture, comprising: A. a metal tube; and B. a foamed ceramic body surrounding and bonded to said tube, said ceramic body consisting essentially of about:
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |