US4970180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repairing material of a brick
Assignee: Coorstek KK
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Filing: 1989-09-01
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Granted: 1990-11-13
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Expires: 2009-09-01
Abstract
Abstract Disclosed herein are a refractory repairing material for repairing a brick comprising a mixture of 70 to 80 wt % of alumina having not more than 1 mm of grain size, which comprises 25 to 30 wt % of the above amount with a grain size not passing through a 325 mesh and 45 to 50 wt % of the above amount with a grain size passing through a 325 mesh; 1 to 7 wt % of carbonaceous material having a grain size passing through a 60 mesh; 1 to 5 wt % of magnesia having a grain size passing through a 325 mesh; and 10 to 25 wt % of aluminum phosphate, and a method of repairing a plate-like brick.
Inventors
- 👤 Takao Sugino
- 👤 Toshio Kawamura
- 👤 Masamichi Asai
- 👤 Hiroshi Yamada
- 👤 Kenichi Mukoyama
- 👤 Akira Takahashi
- 👤 Hiroshi Hikima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:48
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/6306; C04B35/6309; C04B35/013; C04B35/101; C04B35/103; C04B35/66; C04B2111/00; C04B2111/72; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3217; C04B2235/42; C04B2235/422
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
A refractory repairing material for repairing a plate-like brick used in a sliding gate for controlling a flow rate of high temperature liquid material, consisting essentially of a mixture of: 70 to 80 wt % of alumina having a grain size of 1 mm or less, which comprises 25 to 30 wt % of the above amount having a grain size of greater than 325 mesh and 45 to 50 wt % of the above amount having a grain size passing through a 325 mesh; 1 to 7 wt % of carbonaceous material having a grain size passing through a 60 mesh; 1 to 5 wt % of magnesia having a grain size passing through a 325 mesh; and 10 to 25 wt % of aluminum phosphate.
Claim 2
Dependent Claim
127 words
A refractory repairing material for repairing a plate-like brick used in a sliding gate for controlling a flow rate of high temperature liquid material, consisting essentially of a mixture of: 70 to 80 wt % of alumina having a grain size of 1 mm or less, which comprises 25 to 30 wt % of the above amount having a grain size of greater than 325 mesh and 45 to 50 wt % of the above amount having a grain size passing through a 325 mesh; 1 to 7 wt % of carbonaceous material having a grain size passing through a 60 mesh; 1 to 5 wt % of magnesia having a grain size passing through a 325 mesh; and 10 to 25 wt % of aluminum phosphate.
Claim 3
Dependent Claim
94 words
A refractory repairing material according to claim 1, wherein said mixture comprises 70 to 75 wt % of alumina having a grain size of 1 mm or less, which comprises 25 to 28 wt % of the above amount having a grain size of greater than 325 mesh and 45 to 48 wt % of the above amount having a grain size passing through a 325 mesh; 1 to 3.5 wt % of said carbonaceous material; 1.5 to 3.5 wt % of said magnesia; and 20 to 25 wt % of said aluminum phosphate.
References Cited (Backward Citations)
US3649313A
Cited
US4334029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |