US3923484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame method of producing glass
Assignee: Corning Glass Works
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Filing: 1974-01-11
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Granted: 1975-12-02
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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), entraining an oxide, or material convertible thereto, in the form of solid particles not over about one micron in size, and simultaneously passing the vapors and particles into a flame of combustible gas to form and codeposit an oxide mixture.
Inventors
- 👤 Eric N Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:50
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/14; C03C; C03C3/00; C03C3/04; C03C3/06; C03C2201/00; C03C2201/06; C03C2201/30; C03C2201/32; C03C2201/34; C03C2201/3417; C03C2201/40; C03C2203/00; C03C2203/40; C03C2203/42; C03C2203/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 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, SEO2, AND MIXTURES THEREOF THAT WILL HYDROLYZE IN A FLAME TO PRODUCE THE CORRESPONDING GLASS FORMING OXIDES IN PARITCULATE FORM; B. ENTRAINING WITHIN A GAS STREAM FINELY DIVIDED SOLID PARTICLES THAT DO NOT EXCEED ABOUT ONE MICRON IN SIZE OF A METAL OXIDE ADDITIVE, OR A METAL OR METAL COMPOUND CONVERTIBLE THERETO BY HEAT TREATMENT IN A FLAME; AND C. COMBINING SAID GAS STREAM CONTAINING THE SAID VAPORS AND SAID GAS STREAM CONTAINING THE SAID FINELY DIVIDED SOLID PARTICLES AND THEN PASSING THE COMBINED GAS STREAM INTO THE FLAME OF A COMBUSTION BURNER TO FORM AND CODEPOSIT A HOMOGENEOUS OXIDE MIXTURE AS A GLASS BODY FREE FROM VISUAL INCLUSIONS OF INHOMOGENEITIES.
Claim 2
Independent Claim
145 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, SEO2, AND MIXTURES THEREOF THAT WILL HYDROLYZE IN A FLAME TO PRODUCE THE CORRESPONDING GLASS FORMING OXIDES IN PARITCULATE FORM; B. ENTRAINING WITHIN A GAS STREAM FINELY DIVIDED SOLID PARTICLES THAT DO NOT EXCEED ABOUT ONE MICRON IN SIZE OF A METAL OXIDE ADDITIVE, OR A METAL OR METAL COMPOUND CONVERTIBLE THERETO BY HEAT TREATMENT IN A FLAME; AND C. COMBINING SAID GAS STREAM CONTAINING THE SAID VAPORS AND SAID GAS STREAM CONTAINING THE SAID FINELY DIVIDED SOLID PARTICLES AND THEN PASSING THE COMBINED GAS STREAM INTO THE FLAME OF A COMBUSTION BURNER TO FORM AND CODEPOSIT A HOMOGENEOUS OXIDE MIXTURE AS A GLASS BODY FREE FROM VISUAL INCLUSIONS OF INHOMOGENEITIES.
Claim 3
Dependent Claim
44 words
A method in accordance with claim 1 wherein said compound of SiO2 that will hydrolyze in a flame is silicon tetrachloride (SiCl4) and said finely divided particles are of a cobalt oxide or a cobalt compound convertible thereto by heat treatment in a flame.
Claim 4
Independent Claim
161 words
A method for making a transparent, homogeneous glass body consisting of at least two constituent oxides comprising the steps: particulate a. entraining within a gas stream vapors of a compound of SiO2, GeO2, B2O3, P2O5, SeO2, and mixtures thereof that will hydrolyze in a flame to produce the corresponding glass forming oxide in particulate form; b. entraining within a gas stream finely divided solid particles that do not exceed about one micron in size of a metal oxide additive, or a metal or metal compound convertible thereto by heat treatment in a flame; c. combining said gas stream containing the said vapors and said gas stream containing the said finely divided solid particles and then passing the combined gas stream 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 visual inclusions or inhomogeneities by heat treatment thereof.
Claim 5
Independent Claim
161 words
A method for making a transparent, homogeneous glass body consisting of at least two constituent oxides comprising the steps: particulate a. entraining within a gas stream vapors of a compound of SiO2, GeO2, B2O3, P2O5, SeO2, and mixtures thereof that will hydrolyze in a flame to produce the corresponding glass forming oxide in particulate form; b. entraining within a gas stream finely divided solid particles that do not exceed about one micron in size of a metal oxide additive, or a metal or metal compound convertible thereto by heat treatment in a flame; c. combining said gas stream containing the said vapors and said gas stream containing the said finely divided solid particles and then passing the combined gas stream 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 visual inclusions or inhomogeneities by heat treatment thereof.
Claim 6
Dependent Claim
44 words
A method in accordance with claim 3 wherein said compound of SiO2 that will hydrolyze in a flame is silicon tetrachloride (SiCl4) and said finely divided particles are of a cobalt oxide or a cobalt compound convertible thereto by heat treatment in a flame.
References Cited (Backward Citations)
US3826560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |