US4568595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated ceramic structure and method of making same
Assignee: Vesuvius Crucible Co
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Filing: 1984-04-26
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Granted: 1986-02-04
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Expires: 2004-04-26
Abstract
Abstract A ceramic structure comprises a reticulated ceramic portion defined by a plurality of interconnecting webs having a pore distribution of between 5 and 125 (ppi) pores per linear inch and a ceramic coating portion sintered to the webs along a surface defined by one face of said coating. The coating has a thickness less than about 3 millimeters. The ratio of average thickness of the coating to the thickness of the web forming the reticulated ceramic is between 1 and 10.
Inventors
- 👤 Jeffrey R. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:00
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2068; B01D39/2093; C; C04; C04B; C04B38/00; C04B38/06; C04B38/0615; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; F27D1/0009; F27D1/04; F27D1/06; F27D1/063; F28; F28F; F28F21/00; F28F21/04; Y; Y10; Y10T; Y10T428/00; Y10T428/21; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
A ceramic structure comprising: (a) a reticulated ceramic portion defined by a plurality of interconnecting webs having a pore distribution of between 5 and 125 pores per linear inch and (b) a ceramic coating portion sintered directly to the webs along a surface defined by one face of said coating, said coating having a thickness between about 0.25 and 3 millimeters, and the ratio of average thickness of the coating to the thickness of the webs forming the reticulated ceramic being between 1 and 10.
Claim 2
Dependent Claim
85 words
A ceramic structure comprising: (a) a reticulated ceramic portion defined by a plurality of interconnecting webs having a pore distribution of between 5 and 125 pores per linear inch and (b) a ceramic coating portion sintered directly to the webs along a surface defined by one face of said coating, said coating having a thickness between about 0.25 and 3 millimeters, and the ratio of average thickness of the coating to the thickness of the webs forming the reticulated ceramic being between 1 and 10.
Claim 3
Independent Claim
70 words
A method of manufacturing a ceramic structure comprising the steps for: (a) preparing a reticulated ceramic having a plurality of interconnecting webs having a pore distribution between 125 and 65 pores per linear inch. (b) subsequently spraying a ceramic slurry directly upon at least one surface of the reticulated ceramic to form a coating having a thickness between about 0.25 and about 0.50 millimeter thick, (c) firing the composite structure.
Claim 4
Independent Claim
70 words
A method of manufacturing a ceramic structure comprising the steps for: (a) preparing a reticulated ceramic having a plurality of interconnecting webs having a pore distribution between 125 and 65 pores per linear inch. (b) subsequently spraying a ceramic slurry directly upon at least one surface of the reticulated ceramic to form a coating having a thickness between about 0.25 and about 0.50 millimeter thick, (c) firing the composite structure.
Claim 5
Dependent Claim
19 words
The method according to claim 2 wherein the ceramic slurry has a viscosity of between 250 and 6000 centipoise.
Claim 6
Independent Claim
67 words
A method of manufacturing a ceramic structure comprising the steps for: (a) preparing a reticulated ceramic having a plurality of interconnecting webs having a pore distribution between about 125 and about 5 pores per linear inch. (b) subsequently troweling a ceramic slip directly upon at least one surface of the reticulated ceramic to form a coating between 0.5 and 3 millimeters thick, (c) firing the composite structure.
Claim 7
Independent Claim
67 words
A method of manufacturing a ceramic structure comprising the steps for: (a) preparing a reticulated ceramic having a plurality of interconnecting webs having a pore distribution between about 125 and about 5 pores per linear inch. (b) subsequently troweling a ceramic slip directly upon at least one surface of the reticulated ceramic to form a coating between 0.5 and 3 millimeters thick, (c) firing the composite structure.
Claim 8
Dependent Claim
31 words
The method according to claim 4 wherein the ceramic slip has a viscosity of between 15,000 and 40,000 centipoise and the coating has a thickness between about 0.5 and 3 millimeters.
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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) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |