US3883336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing glass in a flame
Assignee: Corning Glass Works
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Filing: 1974-01-11
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Granted: 1975-05-13
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Expires: 1994-01-11
Abstract
Abstract A method of producing a glass body composed of two or more oxides by the flame hydrolysis technique, for example incorporating an additive or dopant oxide in a fused silica glass body. The method comprises forming a gas stream containing vapors of a compound that will hydrolyze to a glass forming oxide, e.g., silicon tetrachloride (SiCl4), nebulizing an oxide forming compound or solution of such compound to form a mist in the nature of an aerosol, and simultaneously directing the mist and gas stream into a flame of combustible gas to form and codeposit a mixture of oxides corresponding to the vaporized and nebulized compounds.
Inventors
- 👤 Eric N Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:42
CPC Classifications
C; C03; C03C; C03C3/00; C03B; C03B19/00; C03B19/14; C03B19/1415; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/01413; C03C13/00; C03C13/04; C03C13/045; C03C3/04; C03C3/06; C03B2201/00; C03B2201/06; C03B2201/08; C03B2201/10; C03B2201/30; C03B2201/40; C03B2201/50; C03B2201/54; C03B2207/00; C03B2207/30; C03B2207/34; C03C2201/00; C03C2201/06; C03C2201/08; C03C2201/10; C03C2201/30; C03C2201/32; C03C2201/40; C03C2201/50; C03C2201/54; C03C2203/00; C03C2203/40; C03C2203/42; C03C2203/44
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A METHOD FOR MAKING A TRANSPARENT, HOMOGENEOUS GLASS BODY CONSISTING OF AT LEAST TWO CONSTITUENT OXIDES COMPRISING THE STEPS: A. ENTRAINING WITHIN A GAS STREAM VAPORS OF A COMPOUND OF SIO2, GEO2, B2O3, P2O5, AND SEO2 THAT WILL HYDROLYZE IN A FLAME TO PRODUCE THE CORRESPONDING GLASS FORMING OXIDE IN PARTICULATE FORM; B. NEBULIZING A SOLUTION CONTAINING A METAL OXIDE OR A METAL COMPOUND THERMALLY CONVERTIBLE BY HEAT TREATMENT IN A FLAME TO A STABLE METAL OXIDE INTO AN AEROSOL CONSISTING OF SUBSTANTIALLY UNIFORMLY-SIZED DROPLETS THAT DO NOT EXCEED ABOUT 10 MICRONS IN DIAMETER; AND C. SIMULTANEOUSLY PASSING SAID VAPORS AND SAID AEROSOL INTO THE FLAME OF A COMBUSTION BURNER TO FORM AND CODEPOSIT A HOMOGENEOUS OXIDE MIXTURE AS A GLASS BODY FREE FROM INCLUSIONS.
Claim 2
Independent Claim
125 words
A METHOD FOR MAKING A TRANSPARENT, HOMOGENEOUS GLASS BODY CONSISTING OF AT LEAST TWO CONSTITUENT OXIDES COMPRISING THE STEPS: A. ENTRAINING WITHIN A GAS STREAM VAPORS OF A COMPOUND OF SIO2, GEO2, B2O3, P2O5, AND SEO2 THAT WILL HYDROLYZE IN A FLAME TO PRODUCE THE CORRESPONDING GLASS FORMING OXIDE IN PARTICULATE FORM; B. NEBULIZING A SOLUTION CONTAINING A METAL OXIDE OR A METAL COMPOUND THERMALLY CONVERTIBLE BY HEAT TREATMENT IN A FLAME TO A STABLE METAL OXIDE INTO AN AEROSOL CONSISTING OF SUBSTANTIALLY UNIFORMLY-SIZED DROPLETS THAT DO NOT EXCEED ABOUT 10 MICRONS IN DIAMETER; AND C. SIMULTANEOUSLY PASSING SAID VAPORS AND SAID AEROSOL INTO THE FLAME OF A COMBUSTION BURNER TO FORM AND CODEPOSIT A HOMOGENEOUS OXIDE MIXTURE AS A GLASS BODY FREE FROM INCLUSIONS.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said vapors consist of a silicon compound.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the aerosol is an aqueous salt solution.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein both said vapors and said aerosol are passed into the same flame.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein said vapors and said aerosol are passed into separate flames.
Claim 7
Independent Claim
140 words
A method for making a transparent, homogeneous glass body consisting of at least two constituent oxides comprising the steps: a. entraining within a gas stream vapors of a compound of SiO2, GeO2, B2O3, P2O5, and SeO2 that will hydrolyze in a flame to produce the corresponding glass forming oxide in particulate form; b. nebulizing a solution containing a metal oxide or a metal compound thermally convertible by heat treatment in a flame to a stable metal oxide into an aerosol consisting of substantially uniformly-sized droplets that do not exceed about 10 microns in diameter; c. simultaneously passing said vapors and said aerosol into the flame of a combustion burner to form and codeposit a homogeneous oxide mixture as a porous preform; and then d. consolidating said porous preform into a nonporous glass body free from inclusions by heat treatment thereof.
Claim 8
Independent Claim
140 words
A method for making a transparent, homogeneous glass body consisting of at least two constituent oxides comprising the steps: a. entraining within a gas stream vapors of a compound of SiO2, GeO2, B2O3, P2O5, and SeO2 that will hydrolyze in a flame to produce the corresponding glass forming oxide in particulate form; b. nebulizing a solution containing a metal oxide or a metal compound thermally convertible by heat treatment in a flame to a stable metal oxide into an aerosol consisting of substantially uniformly-sized droplets that do not exceed about 10 microns in diameter; c. simultaneously passing said vapors and said aerosol into the flame of a combustion burner to form and codeposit a homogeneous oxide mixture as a porous preform; and then d. consolidating said porous preform into a nonporous glass body free from inclusions by heat treatment thereof.
Claim 9
Dependent Claim
13 words
The method of claim 6 wherein said vapors consist of a silicon compound.
Claim 10
Dependent Claim
13 words
The method of claim 6 wherein the aerosol is an aqueous salt solution.
Claim 11
Dependent Claim
18 words
The method of claim 6 wherein both said vapors and said aerosol are passed into the same flame.
Claim 12
Dependent Claim
16 words
The method of claim 6 wherein said vapors and said aerosol are passed into separate flames.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |