US4645524A
Expired / Lapsed
US
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Method for making sodium-containing glass
Assignee: Corning Glass Works
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Filing: 1985-04-22
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Granted: 1987-02-24
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Expires: 2005-04-22
Abstract
Abstract A method for producing sodium-containing glasses, by a vapor deposition process wherein a vapor mixture containing a sodium fluoroalkoxide compound is reacted to provide a particulate sodium-containing vapor deposition product which can be sintered to a glass.
Inventors
- 👤 Peter L. Bocko
- 👤 David A. Thompson
- 👤 William J. Wein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:40
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/01413; C03C; C03C17/00; C03C17/22; C03B19/00; C03B19/14; C03B19/1415; C03C3/00; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/64; C03B2201/00; C03B2201/06; C03B2201/30; C03B2201/32; C03B2201/50; C03B2207/00; C03B2207/04; C03B2207/06; C03B2207/08; C03B2207/12; C03B2207/20; C03B2207/30; C03B2207/80; C03B2207/85; C03B2207/86; Y; Y10; Y10S; Y10S65/00; Y10S65/15; Y10S65/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A method for making a sodium containing glass article which comprises the steps of: (a) forming a vapor reaction mixture containing vapors of at least two vaporizable constituents which react together in the vapor phase to form a composition for a vapor-deposited glass, wherein one of the vaporizable constituents is a sodium fluoroalkoxide compound; (b) initiating a chemical vapor deposition reaction in the vapor mixture to generate a particulate sodium-containing vapor deposition product, and collecting the vapor deposition product; and (c) heating the vapor deposition product to at least partially sinter said deposition product to a sodium-containing glass product.
Claim 2
Independent Claim
99 words
A method for making a sodium containing glass article which comprises the steps of: (a) forming a vapor reaction mixture containing vapors of at least two vaporizable constituents which react together in the vapor phase to form a composition for a vapor-deposited glass, wherein one of the vaporizable constituents is a sodium fluoroalkoxide compound; (b) initiating a chemical vapor deposition reaction in the vapor mixture to generate a particulate sodium-containing vapor deposition product, and collecting the vapor deposition product; and (c) heating the vapor deposition product to at least partially sinter said deposition product to a sodium-containing glass product.
Claim 3
Dependent Claim
41 words
A method in accordance with claim 1 wherein the mixture of vaporizable constituents react together in the vapor phase to form a vitrifiable composition, and wherein the sodium-containing vapor deposition product is heated to sinter it to a non-porous sodium-containing glass.
Claim 4
Dependent Claim
26 words
A method in accordance with claim 2 wherein the glass is a sodium-doped fused silica glass consisting essentially of Na 2 O and SiO 2 .
Claim 5
Dependent Claim
30 words
A method in accordance with claim 2 wherein the glass is a sodium aluminosilicate glass which consists essentially of Na 2 O, Al 2 O 3 and SiO 2 .
Claim 6
Dependent Claim
30 words
A method in accordance with claim 2 wherein the sodium fluoroalkoxide compound has a volatility such that it can be vaporized without significant decomposition at some temperature below 250° C.
Claim 7
Dependent Claim
34 words
A method in accordance with claim 5 wherein the sodium fluoroalkoxide compound is of the formula: Na--O--R wherein O is oxygen and R is a fluorocarbon or fluorohydrocarbon group of from 3-5 carbon atoms.
Claim 8
Dependent Claim
24 words
A method in accordance with claim 6 wherein the sodium fluoroalkoxide compound is selected from the group consisting of sodium hexafluoroisopropoxide and sodium perfluoro-t-butoxide.
References Cited (Backward Citations)
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JPS5632344A
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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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |