US4008183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature anticorrosive molded product
Assignee: Denka Co Ltd
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Filing: 1975-08-14
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Granted: 1977-02-15
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Expires: 1995-08-14
Abstract
Abstract A high temperature anticorrosive molded product produced by hot pressing a mixture comprising 1-10 weight parts of powdery aluminum and 100 weight parts of a powdery composition comprising an electric conductive refractory, boron nitride and aluminum nitride wherein said powdery composition is encompassed by the range electric conductive refractory : boron nitride : aluminum nitride as shown in the basal triangle of 40 : 20 : 40, 50 : 10 : 40, 70 : 10 : 20, 70 : 20 : 10 and 40 : 50 : 10 of FIG. 1.
Inventors
- 👤 Masaji Ishii
- 👤 Akio Mikogami
- 👤 Tetsuo Torigai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:03
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/5607; C04B35/5622; C04B35/5611; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/58078; C04B35/581; C04B35/583; C04B35/622; C04B35/64; C04B35/645; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
A high temperature, anticorrosive molded product produced by hot pressing a mixture, comprising 1-10 parts by weight of powdered aluminum and 100 parts by weight of a powdered composition of an electrically conductive refractory, boron nitride and aluminum nitride wherein said powdery composition is encompassed by the range electrically conductive refractory: boron nitride: aluminum nitride as shown in the basal triangle of 40:20:40, 50:10:40, 70:10:20, 70:20:10 and 40:50:10 of FIG. 1, and wherein said electrically conductive refractory is a material having a specific resistance of less than 100μΩ-cm at room temperature and a melting point greater than 2300° C.
Claim 2
Dependent Claim
99 words
A high temperature, anticorrosive molded product produced by hot pressing a mixture, comprising 1-10 parts by weight of powdered aluminum and 100 parts by weight of a powdered composition of an electrically conductive refractory, boron nitride and aluminum nitride wherein said powdery composition is encompassed by the range electrically conductive refractory: boron nitride: aluminum nitride as shown in the basal triangle of 40:20:40, 50:10:40, 70:10:20, 70:20:10 and 40:50:10 of FIG. 1, and wherein said electrically conductive refractory is a material having a specific resistance of less than 100μΩ-cm at room temperature and a melting point greater than 2300° C.
Claim 3
Dependent Claim
31 words
The high temperature anticorrosive molded product of claim 1, wherein the electrically conductive refractory comprises TiB 2 , ZrB 2 , TiC, ZrC or a mixture thereof as a main component.
Claim 4
Dependent Claim
36 words
The high temperature anticorrosive molded product according to claim 1, wherein 3-7 wt. % of a fine aluminum powder is added based on the total amount of the electrically conductive refractory, boron nitride and aluminum nitride.
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) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |