Patent US4157328A successfully refreshed from Google Patents.
US4130438A
Expired / Lapsed
US
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Basic composite unburned brick
Assignee: Krosaki Harima Corp
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Filing: 1977-11-23
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Granted: 1978-12-19
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Expires: 1997-11-23
Abstract
Abstract A composite brick is proposed which is produced by integrally molding two kinds of bodies, a magnesia-carbonaceous refractory and a basic refractory. These two bodies are put into respective positions in a metal case partitioned by a plate and subjected to pressure molding into a compact brick unit. This composite brick is much less expensive than the conventional high-purity magnesia-carbonaceous bricks. This means a substantial saving in the manufacturing cost of a furnace.
Inventors
- 👤 Akira Watanabe
- 👤 Yukio Kusaka
- 👤 Yoshihiro Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:25
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/063; B; B32; B32B; B32B18/00; C; C04; C04B; C04B35/00; C04B35/01; C04B35/013; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/48; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/36; C04B2237/363; C04B2237/50; C04B2237/70; C04B2237/704
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
A composite unburned brick comprising: a magnesia-carbonaceous refractory body portion; and a basic refractory body portion integrally molded to one side of magnesia-carbonaceous refractory body portion.
Claim 2
Dependent Claim
26 words
A composite unburned brick comprising: a magnesia-carbonaceous refractory body portion; and a basic refractory body portion integrally molded to one side of magnesia-carbonaceous refractory body portion.
Claim 3
Dependent Claim
23 words
A composite unburned brick as claimed in claim 1 wherein said magnesia-carbonaceous refractory comprises at least one magnesia material and a carbonaceous material.
Claim 4
Dependent Claim
32 words
A composite unburned brick as claimed in claim 2 wherein the content of said magnesia material is 10-99 percent by weight and that of said carbonaceous material is 90-1 percent by weight.
Claim 5
Dependent Claim
23 words
A composite unburned brick as claimed in claim 1 wherein said brick has at least one side thereof covered with a metal plate.
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) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |