US5061663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
AlN and AlN-containing composites
Assignee: EIDP Inc
•
Filing: 1989-04-14
•
Granted: 1991-10-29
•
Expires: 2009-04-14
Abstract
Abstract Shaped articles of polycrystalline AlN and AlN-containing composites; the AlN articles having thermal conductivities of at least about 70 W/mK (watts/meter °K); the AlN component effecting good thermal conductivity in the composited articles.
Inventors
- 👤 John D. Bolt
- 👤 Frederick N. Tebbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/581; C04B35/622; C04B35/62227; C08; C08G; C08G79/00; C08G79/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
23 words
A shaped article in the form of a fiber of polycrystalline aluminum nitride having a thermal conductivity of at least about 70 W/mK.
Claim 2
Dependent Claim
23 words
A shaped article in the form of a fiber of polycrystalline aluminum nitride having a thermal conductivity of at least about 70 W/mK.
Claim 3
Dependent Claim
30 words
A shaped article according to claim 1 having an oxygen content between about 0.5 to 1.5 weight percent and a carbon content of not more than about 0.5 weight percent.
Claim 4
Dependent Claim
18 words
A shaped article according to claim 2 having an oxygen content of about 0.5 weight percent or less.
Claim 5
Dependent Claim
19 words
A shaped article according to claim 1 having a density substantially equivalent to the theoretical density of aluminum nitride.
Claim 6
Dependent Claim
19 words
A shaped article according to claim 2 having a density substantially equivalent to the theoretical density of aluminum nitride.
Claim 7
Dependent Claim
19 words
A shaped article according to claim 3 having a density substantially equivalent to the theoretical density of aluminum nitride.
References Cited (Backward Citations)
CA839321A
Cited
GB936544A
Cited
US3505246A
Cited
US3658979A
Cited
US3651112A
Cited
US3529044A
Cited
US3846527A
Cited
FR2096394A1
Cited
US4010223A
Cited
SU477139A1
Cited
US4179459A
Cited
JPS5413439A
Cited
US4650777A
Cited
US4672046A
Cited
JPS61124626A
Cited
EP0213629A2
Cited
US4761388A
Cited
US4719187A
Cited
US4755491A
Cited
US4803183A
Cited
US4764321A
Cited
US4740574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |