US4873353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preceramic compositions and ceramic products
Assignee: Ethyl Corp
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Filing: 1989-02-06
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Granted: 1989-10-10
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Expires: 2009-02-06
Abstract
Abstract Preceramic compositions which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by mixing about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polycarbosilane in an organic solvent.
Inventors
- 👤 Leonard M. Niebylski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:11
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C01; C01B; C01B33/00; C01B33/02; C04B41/45; C04B41/4505; C04B41/455; C04B41/4554; C04B41/80; C04B41/81; C08; C08G; C08G77/00; C08G77/60; C08G79/00; C08L; C08L83/00; C08L83/16; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/124; D01F11/126; D01F11/128; D01F11/14
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
28 words
A process which comprises mixing about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polycarbosilane in an organic solvent.
Claim 2
Dependent Claim
28 words
A process which comprises mixing about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polycarbosilane in an organic solvent.
Claim 3
Dependent Claim
38 words
The process of claim 1 wherein the boroxine is a compound corresponding to the formula: ##STR2## in which R is an alkoxy, phenoxy, alkylphenoxy, phenalkoxy, or alkylphenalkoxy substituent in which any alkyl or alkoxy group contains 1-6 carbons.
Claim 4
Dependent Claim
10 words
The process of claim 2 wherein the boroxine is triphenoxyboroxine.
Claim 5
Dependent Claim
10 words
The process of claim 2 wherein the boroxine is trimethoxyboroxine.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the boroxine is a triaryloxyboroxine and the boroxine/polycarbosilane weight ratio is about 1-10/1.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein the boroxine/polycarbosilane weight ratio is about 6-8/1.
Claim 8
Dependent Claim
19 words
The process of claim 1 wherein the boroxine is a trialkoxyboroxine and the boroxine/polycarbosilane weight ratio is about 1-6/1.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein the boroxine/polycarbosilane weight ratio is about 3-4/1.
Claim 10
Dependent Claim
30 words
The process of claim 1 wherein about 6-8 parts by weight of triphenoxyboroxine are mixed with a solution of one part by weight of a polycarbosilane in an organic solvent.
Claim 11
Dependent Claim
30 words
The process of claim 1 wherein about 3-4 parts by weight of trimethoxyboroxine are mixed with a solution of one part by weight of a polycarbosilane in an organic solvent.
Claim 12
Dependent Claim
9 words
A composition prepared by the process of claim 1.
Claim 13
Dependent Claim
9 words
A composition prepared by the process of claim 2.
Claim 14
Dependent Claim
9 words
A composition prepared by the process of claim 3.
Claim 15
Dependent Claim
9 words
A composition prepared by the process of claim 4.
Claim 16
Dependent Claim
9 words
A composition prepared by the process of claim 5.
Claim 17
Dependent Claim
9 words
A composition prepared by the process of claim 6.
Claim 18
Dependent Claim
9 words
A composition prepared by the process of claim 7.
Claim 19
Dependent Claim
9 words
A composition prepared by the process of claim 8.
Claim 20
Dependent Claim
9 words
A composition prepared by the process of claim 9.
Claim 21
Dependent Claim
9 words
A composition prepared by the process of claim 10.
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) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |