US4900700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon nitride-titanium nitride based ceramic composites and methods of preparing the same
Assignee: Carboloy Inc
•
Filing: 1988-05-31
•
Granted: 1990-02-13
•
Expires: 2008-05-31
Abstract
Abstract A ceramic composite containing less than 90% of a single phase silicon aluminum oxynitride and titanium nitride in an amount of up to about 10% by weight. Also disclosed are silicon nitride containing compositions for forming the composite and methods of producing the composite from the composition.
Inventors
- 👤 Choll K. Jun
- 👤 Milivoj K. Brun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:14
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/597
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
A ceramic composite comprising more than 0% and less than 90% by weight of a single phase silicon aluminum oxynitride, yttrium aluminum garnet in an amount of at least about 9% by weight, and titanium nitride in an amount of more than 0% and up to about 10% by weight.
Claim 2
Dependent Claim
50 words
A ceramic composite comprising more than 0% and less than 90% by weight of a single phase silicon aluminum oxynitride, yttrium aluminum garnet in an amount of at least about 9% by weight, and titanium nitride in an amount of more than 0% and up to about 10% by weight.
Claim 3
Dependent Claim
33 words
The ceramic composite of claim 1 wherein the ratio of the sum of silicon and aluminum atoms to the sum of oxygen and nitrogen atoms of the silicon aluminum oxyntride is about 0.75.
Claim 4
Dependent Claim
32 words
The ceramic composite of claim 2 wherein the silicon aluminum oxynitride has the formula Si 6-z Al z O z N 8-z wherein z has a value between about 0.5 and 1.3.
Claim 5
Dependent Claim
20 words
The ceramic composite of claim 1 wherein the amount of titanium nitride is from about 2 to 6% by weight.
Claim 6
Dependent Claim
17 words
The ceramic composite of claim 1 wherein the amount of titanium nitride is about 3% by weight.
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) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |