US3833389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant and strengthened composite materials and method for producing same
Assignee: Toshiba Corp
•
Filing: 1971-12-23
•
Granted: 1974-09-03
•
Expires: 1991-12-23
Abstract
Abstract Heat resistant and strengthened composite materials are obtained by mixing, and sintering in a non-oxidizing atmosphere, the combination of powders of aluminum nitride and/or silicon nitride, with powders of an oxide of lanthanum, cerium, scandium, yttrium, and/or yttrium aluminum garnet, and with powders or whiskers of silicon carbide, boron nitride and/or carbon. The composite material so produced is characterized by high shock resistance and excellent mechanical strength.
Inventors
- 👤 K Komeya
- 👤 A Tsuge
- 👤 H Inque
- 👤 H Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B35/515; C04B35/58; C04B35/581; C04B35/584; C04B35/593; C04B35/597; C04B35/71; C04B35/78; C04B35/80; Y; Y10; Y10T; Y10T407/00; Y10T407/27
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
The heat resistant material of claim 1 wherein the second component materials are present in an amount of up to 50% by weight of the mixture.
Claim 2
Dependent Claim
22 words
The heat resistant material of claim 1 wherein the third component materials are used in amounts of less than 50% by volume.
Claim 3
Dependent Claim
23 words
The heat resistant material of claim 1 which contains a fibrous crystalline structure which is substantially parallel to the surface of said material.
References Cited (Backward Citations)
US3108887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |