US4016313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant material
Assignee: Bulten Kanthal AB
•
Filing: 1975-07-28
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Granted: 1977-04-05
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Expires: 1995-07-28
Abstract
Abstract A heat resistant material comprising a recrystallized (self bound) skeleton of silicon carbide the pores of which are filled by infiltration of a heat resistant infiltration material, such as a silicon-molybdenum disilicide composition, so that the porosity is less than 5 % and preferably less than 2 %, the composition of the final material being such that the bending strength thereof at room temperature is at least 5 kp/mm 2 , and preferably above 10 kg/mm 2 , such as of the order of 20 kp/mm 2 .
Inventors
- 👤 Nils G. Schrewelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:10
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/573; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; F27D5/00; F27D5/0006; F27D5/0012; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/24; Y10T428/24174
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A heat resistant fixture for use in firing kilns comprising a porous skeleton of self-bonded silicon carbide, the pores of which are substantially filled with an impregnant containing molybdenum disilicide and from 10 to 60% by weight silicon, said fixture being hollow and having a supporting surface formed thereon.
Claim 2
Dependent Claim
49 words
A heat resistant fixture for use in firing kilns comprising a porous skeleton of self-bonded silicon carbide, the pores of which are substantially filled with an impregnant containing molybdenum disilicide and from 10 to 60% by weight silicon, said fixture being hollow and having a supporting surface formed thereon.
Claim 3
Dependent Claim
12 words
The fixture of claim 1 in which said impregnant also contains aluminum.
Claim 4
Dependent Claim
21 words
The fixture of claim 1 which has a major dimension substantially greater than a minor dimension perpendicular to said major dimension.
Claim 5
Dependent Claim
22 words
The fixture of claim 3 in which said fixture has partitioned walls dividing the hollow interior of said fixture into elongated passages.
Claim 6
Dependent Claim
21 words
The fixture of claim 3 in which said fixture has a wall thickness on the order of 1 to 10 mm.
References Cited (Backward Citations)
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US2637091A
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US3246275A
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US3228084A
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US3492153A
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US3377670A
Cited
US3649342A
Cited
US3852099A
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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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |