Patent US4693918A successfully refreshed from Google Patents.
US4693918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for firing ceramics
Assignee: Coorstek KK
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Filing: 1986-03-27
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Granted: 1987-09-15
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Expires: 2006-03-27
Abstract
Abstract A tool for firing ceramics such as a setter and crucible comprises a ceramic foam body which has a three-dimensionally reticulated structure comprising plural interconnected ceramic strands, and a ceramic setting layer formed on at least one part of the surface of the ceramic foam body.
Inventors
- 👤 Masashi Fujimoto
- 👤 Yoshihisa Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:39
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/0615; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; F27D5/00; F27B; F27B14/00; F27B14/08; F27B14/10; F27D1/0009; F27D3/00; F27D3/12; F27D2003/124; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249986; Y10T428/249987; Y10T428/249988; Y10T428/24999
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
49 words
A tool for firing ceramics, comprising a ceramic foam body having a three-dimensionally reticulated structure comprising plural interconnected ceramic strands, and a ceramic setting layer formed on at least one part of the surface of the ceramic foam body, wherein each of said ceramic strands comprises plural ceramic layers.
Claim 2
Dependent Claim
49 words
A tool for firing ceramics, comprising a ceramic foam body having a three-dimensionally reticulated structure comprising plural interconnected ceramic strands, and a ceramic setting layer formed on at least one part of the surface of the ceramic foam body, wherein each of said ceramic strands comprises plural ceramic layers.
Claim 3
Dependent Claim
19 words
A tool for firing ceramics according to claim 1, wherein said ceramic setting layer comprises a ceramic coating layer.
Claim 4
Dependent Claim
23 words
A tool for firing ceramics according to claim 2, wherein said ceramic coating layer comprises the same material as said ceramic foam body.
Claim 5
Dependent Claim
24 words
A tool for firing ceramics according to claim 1, wherein said ceramic setting layer comprises a light-weight layer comprising refractory material and ceramic fiber.
Claim 6
Dependent Claim
21 words
A tool for firing ceramics according to claim 1, wherein said ceramic foam body comprises alumina, silicon carbide, zirconia or alumina-zirconia.
Claim 7
Dependent Claim
17 words
A tool for firing ceramics according to claim 1, which is in the form of a setter.
Claim 8
Dependent Claim
14 words
A tool for firing ceramics according to claim 6, wherein said setter has supports.
Claim 9
Dependent Claim
24 words
A tool for firing ceramics according to claim 1, wherein said ceramic foam body has a bulk density of from about 0.4 to 2.
Claim 10
Dependent Claim
24 words
A tool for firing ceramics according to claim 1, wherein said ceramic foam body has a bulk density of from about 0.7 to 1.5.
Claim 11
Dependent Claim
24 words
A tool for firing ceramics according to claim 1, wherein said ceramic foam body has a void ratio of from about 80% to 90%.
Claim 12
Dependent Claim
26 words
A tool for firing ceramics according to claim 1, wherein said ceramic foam body has a pore size of from about 0.5 mm to 4 mm.
Claim 13
Dependent Claim
22 words
A tool for firing ceramics according to claim 11, wherein each of said ceramic strands comprises a hollow channel at its center.
Claim 14
Dependent Claim
19 words
A tool for firing ceramics according to claim 1, wherein said plural ceramic layers are of the same composition.
Claim 15
Dependent Claim
18 words
A tool for firing ceramics according to claim 1, wherein said plural ceramic layers are of different compositions.
Claim 16
Dependent Claim
38 words
A crucible for firing ceramics comprising (a) a ceramic foam body having a three-dimensionally reticulated structure comprising plural interconnected ceramic strands and (b) a ceramic setting layer formed on at least one surface of the ceramic foam body.
Claim 17
Dependent Claim
38 words
A crucible for firing ceramics comprising (a) a ceramic foam body having a three-dimensionally reticulated structure comprising plural interconnected ceramic strands and (b) a ceramic setting layer formed on at least one surface of the ceramic foam body.
References Cited (Backward Citations)
US3930085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |