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US4454239A
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Carbonaceous refractory composition for pressing brick shapes
Assignee: NATIONAL REFRACTORIES & MINERALS Corp A CORP OF
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Filing: 1983-05-25
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Granted: 1984-06-12
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Expires: 2003-05-25
Abstract
Abstract A more pressable composition for making graphitic refractory brick from oxide aggregate with a carbon bond is obtained when the refractory oxide aggregate is substantially all coarser than 0.15 mm (+100 mesh), preferably coarser than 0.2 mm (+65 mesh), and most preferably coarser than 0.4 mm (+35 mesh), and the matrix is entirely carbonaceous material, such as graphite, particularly flake graphite, resin, particularly a phenol formaldehyde resin, together with such other carbonaceous materials as carbon black, calcined coke, anthracite, and the like.
Inventors
- 👤 Nicholas Cassens, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:10
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/013
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
77 words
A carbonaceous pressed refractory brick consisting essentially of (1) from 60 to 90% refractory oxide aggregate, substantially all of which is coarser than 0.15 mm, and (2) a carbonaceous matrix of from 9.6% to 28.1% graphite, substantially all finer than 0.4 mm, 2% to 8% resin, and from 0% to 6% other carbon material, said matrix being substantially free of oxide refractory material, all percentages being by weight and based on the total weight of the composition.
Claim 2
Dependent Claim
77 words
A carbonaceous pressed refractory brick consisting essentially of (1) from 60 to 90% refractory oxide aggregate, substantially all of which is coarser than 0.15 mm, and (2) a carbonaceous matrix of from 9.6% to 28.1% graphite, substantially all finer than 0.4 mm, 2% to 8% resin, and from 0% to 6% other carbon material, said matrix being substantially free of oxide refractory material, all percentages being by weight and based on the total weight of the composition.
Claim 3
Dependent Claim
11 words
Composition according to claim 1 wherein the graphite is flake graphite.
Claim 4
Dependent Claim
13 words
Composition according to claim 1 wherein the resin is a phenol formaldehyde resin.
Claim 5
Dependent Claim
11 words
Composition according to claim 3 wherein the graphite is flake graphite.
Claim 6
Dependent Claim
14 words
Composition according to claim 1, 2, 3, or 4, wherein the aggregate is periclase.
Claim 7
Dependent Claim
13 words
Composition according to claim 5 wherein the periclase contains at least 95% MgO.
Claim 8
Dependent Claim
18 words
Composition according to claim 1, 2, 3, or 4, wherein the aggregate is all coarser than 0.2 mm.
Claim 9
Dependent Claim
18 words
Composition according to claim 1, 2, 3, or 4, wherein the aggregate is all coarser than 0.4 mm.
Claim 10
Dependent Claim
10 words
Composition according to claim 7 wherein the aggregate is periclase.
Claim 11
Dependent Claim
10 words
Composition according to claim 8 wherein the aggregate is periclase.
Claim 12
Dependent Claim
15 words
Composition according to claim 9 wherein the aggregate is periclase containing at least 95% MgO.
Claim 13
Dependent Claim
15 words
Composition according to claim 10 wherein the aggregate is periclase containing at least 95% MgO.
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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |