Patent FR477117A successfully refreshed from Google Patents.
Patent US4083708A successfully refreshed from Google Patents.
US4083708A
Expired / Lapsed
US
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Forming a glass on a substrate
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-07-13
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Granted: 1978-04-11
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Expires: 1997-07-13
Abstract
Abstract Adherent layers of glass are deposited on a preform or substrate via the controlled oxidation of a glass precursor, such as silicon monoxide, in the vapor state, thereby providing unusual shaped composite articles having a glass coating on the substrate. A preform or substrate such as carbon can subsequently be oxidized, thereby providing a glass microcapillary of exceedingly uniform dimensions.
Inventors
- 👤 Carl E. Heath
- 👤 Daniel Grafstein
- 👤 John V. Milewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:21
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/401; C23C16/402; C03; C03C; C03C25/00; C03C25/10; C03C3/00; C03C3/04; C03C3/06; C23C16/01; C23C16/44; C23C16/448; C23C16/4488; C03C2201/00; C03C2201/02; C03C2203/00; C03C2203/40
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
85 words
A method for forming a composite glass article having a glass exterior coating on a shaped substrate comprising: placing a shaped substrate in a reaction chamber, said substrate being selected from materials chemically and thermally stable under glass deposition temperatures; introducing a stream of a glass precursor consisting essentially of generated silicon monoxide and being capable of being oxidized to a glass; simultaneously introducing an oxidizing gas into the reaction chamber whereby the glass precursor is oxidized to a glass and deposited on said substrate.
Claim 2
Independent Claim
85 words
A method for forming a composite glass article having a glass exterior coating on a shaped substrate comprising: placing a shaped substrate in a reaction chamber, said substrate being selected from materials chemically and thermally stable under glass deposition temperatures; introducing a stream of a glass precursor consisting essentially of generated silicon monoxide and being capable of being oxidized to a glass; simultaneously introducing an oxidizing gas into the reaction chamber whereby the glass precursor is oxidized to a glass and deposited on said substrate.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the substrate is selected from carbon, boron, silicon carbide, refractory metals, and carbides and nitrides of refractory metals.
Claim 4
Dependent Claim
60 words
The process of claim 1 wherein the oxidizing gas is a mixture of CO 2 , CO, CH 4 , H 2 and N 2 , having a CO 2 /CO ratio of between 0.015:1 to 0.05:1, a H 2 /N 2 ratio of between 20:1 and 3:1 and CH 4 /H 2 ratio of between about 0.01:1 to 0.2:1.
Claim 5
Dependent Claim
66 words
The process of claim 3 wherein the oxidizing gas is a mixture of CO 2 , CO, H 2 , CH 4 and N 2 and the ratio of CO 2 /CO is within the range of 0.03:1 to 0.04:1, the ratio of CH 4 /H 2 is in the range of 0.04:1 to 0.08:1, and the ratio of H 2 N 2 is about 6:1.
Claim 6
Dependent Claim
22 words
The method of claim 3 wherein the temperature in the reaction zone is maintained in the range of 1300° to 1700° C.
Claim 7
Dependent Claim
10 words
The method of claim 5 wherein said substrate is carbon.
Claim 8
Dependent Claim
25 words
The method of claim 6 wherein said gases are introduced in amounts sufficient to deposit a thin nonporous layer of silicon dioxide on said substrate.
Claim 9
Independent Claim
108 words
A method of forming a glass article comprising: contacting a silica containing material at temperatures in the range of about 1300° to 1700° C with a gaseous mixture containing hydrogen, methane and nitrogen whereby silicon monoxide is generated; oxidizing said silicon monoxide with a carbon dioxide containing gas in the presence of a carbon substrate at a temperature in the range of 1300° to 1700° C whereby silicon dioxide glass is deposited on said carbon substrate and thereafter maintaining said deposited glass substrate at a temperature between about 800° and 1200° C in the presence of air whereby said carbon substrate is oxidized thereby providing a glass article.
Claim 10
Independent Claim
108 words
A method of forming a glass article comprising: contacting a silica containing material at temperatures in the range of about 1300° to 1700° C with a gaseous mixture containing hydrogen, methane and nitrogen whereby silicon monoxide is generated; oxidizing said silicon monoxide with a carbon dioxide containing gas in the presence of a carbon substrate at a temperature in the range of 1300° to 1700° C whereby silicon dioxide glass is deposited on said carbon substrate and thereafter maintaining said deposited glass substrate at a temperature between about 800° and 1200° C in the presence of air whereby said carbon substrate is oxidized thereby providing a glass article.
Claim 11
Independent Claim
140 words
The method of forming a microcapillary comprising: placing a carbon fiber mandrel in a furnace; introducing into the furnace a silicon monoxide containing gas; simultaneously introducing into the furnace an oxidizing gas containing CO 2 and CO, the composition of said gas being oxidizing with respect to silicon monoxide; maintaining the temperature of said silicon monoxide gas and said oxidizing gas in the range of about 1300° to 1700° C, whereby said silicon monoxide is oxidized to silicon dioxide and deposited on said carbon fiber in an amount sufficient to at least coat the exterior of the carbon fiber with a layer of silicon dioxide glass and thereafter maintaining said glass coated carbon fiber at a temperature between about 800° and 1200° C in the presence of air whereby said carbon fiber is oxidized thereby providing a thin walled microcapillary.
Claim 12
Independent Claim
140 words
The method of forming a microcapillary comprising: placing a carbon fiber mandrel in a furnace; introducing into the furnace a silicon monoxide containing gas; simultaneously introducing into the furnace an oxidizing gas containing CO 2 and CO, the composition of said gas being oxidizing with respect to silicon monoxide; maintaining the temperature of said silicon monoxide gas and said oxidizing gas in the range of about 1300° to 1700° C, whereby said silicon monoxide is oxidized to silicon dioxide and deposited on said carbon fiber in an amount sufficient to at least coat the exterior of the carbon fiber with a layer of silicon dioxide glass and thereafter maintaining said glass coated carbon fiber at a temperature between about 800° and 1200° C in the presence of air whereby said carbon fiber is oxidized thereby providing a thin walled microcapillary.
Claim 13
Dependent Claim
27 words
The method of claim 9 wherein an amount of silicon monoxide is oxidized sufficient to deposit at least 0.05 microns of silicon dioxide on said carbon fiber.
Claim 14
Dependent Claim
60 words
The method of claim 9 wherein said oxidizing gas is a mixture of CO 2 , CO, H 2 , CH 4 and N 2 having a CO 2 /CO ratio of between 0.015:1 to 0.5:1, a H 2 /N 2 ratio of between 20:1 and 3:1 and a CH 4 /H 2 ratio of between about 0.01:1 to 0.2:1.
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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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |