US4740574A
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Aluminum nitride structures
Assignee: EIDP Inc
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Filing: 1986-05-09
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Granted: 1988-04-26
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Expires: 2006-05-09
Abstract
Abstract Aluminum nitride structures are made by pyrolyzing the condensation products of certain organo-aluminum compounds with certain aromatic diamines, triamines or tetraamines.
Inventors
- 👤 John D. Bolt
- 👤 Fred N. Tebbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C01; C01B; C01B21/00; C01B21/06; C01B21/072; C04B35/515; C04B35/58; C04B35/581
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
An condensation polymer from an organo-aluminum compound and an aromatic diamine, triamine, tetraamine or a hydrochloride of such aromatic amines in the molar proportion of 8:1 to 1:1 such organo-aluminum compound being of the formula R.sub.n --Al--X.sub.m where R is aliphatic or aromatic hydrocarbon, X is hydrogen or halogen, and n plus m must equal 3 with the proviso that when X is hydrogen, m is 0 to 3, and when X is halogen, m is 0 to 2.
Claim 2
Dependent Claim
79 words
An condensation polymer from an organo-aluminum compound and an aromatic diamine, triamine, tetraamine or a hydrochloride of such aromatic amines in the molar proportion of 8:1 to 1:1 such organo-aluminum compound being of the formula R.sub.n --Al--X.sub.m where R is aliphatic or aromatic hydrocarbon, X is hydrogen or halogen, and n plus m must equal 3 with the proviso that when X is hydrogen, m is 0 to 3, and when X is halogen, m is 0 to 2.
Claim 3
Dependent Claim
11 words
The product of claim 1 wherein the organo-aluminum compound is triethylaluminum.
Claim 4
Dependent Claim
9 words
A shaped article of the product of claim 1.
Claim 5
Dependent Claim
8 words
A filament of the product of claim 1.
Claim 6
Dependent Claim
11 words
A pyrolysis product of claim 1 comprising aluminum nitride and carbon.
Claim 7
Dependent Claim
97 words
A process for preparing the product of claim 1 comprising reacting an organo-aluminum compound of the formula R.sub.n --Al--X.sub.m where R is aliphatic or aromatic hydrocarbon, X is hydrogen or halogen, and n plus m must equal 3 with the proviso that when X is hydrogen, m is 0 to 3, and when X is halogen, m is 0 to 2, with an aromatic diamine, triamine, tetraamnine or a hydrochloride of such aromatic amines in the molar proportions of 8:1 to 1:1 in the presence of an organic solvent inert to the reactants under the polymerization conditions.
Claim 8
Dependent Claim
11 words
The process of claim 7 wherein the organo-aluminum compound is triethylaluminum.
Claim 9
Dependent Claim
9 words
A process comprising pyrolyzing the product of claim 1.
References Cited (Backward Citations)
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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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |