Patent US3801294A successfully refreshed from Google Patents.
US3801294A
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US
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Method of producing glass
Assignee: Corning Glass Works
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Filing: 1971-12-15
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Granted: 1974-04-02
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Expires: 1991-12-15
Abstract
Abstract An improved method is described for the production of glass by the decomposition of a mixture of glass forming compounds in the flame of a combustible gas to form an oxide mixture which is vitrified. The improvement includes generating vapors from a decomposable solid material that has a vapor pressure equal to 5 mm. Hg at a temperature above ambient temperature but not over 500*C. The vapors are generated by suspending the material in finely divided form in a heated chamber and passing a carrier gas through the material. The method is especially useful in the production of modified vitreous silica glasses.
Inventors
- 👤 P Schultz
- 👤 F Voorhees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:11
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/14; C03B19/1415; C03B2201/00; C03B2201/06; C03B2201/30; C03B2201/32; C03B2201/40; C03B2201/54; C03B2207/00; C03B2207/80; C03B2207/90; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
The method of claim 1 wherein the glass produced is a modified vitreous silica glass.
Claim 2
Dependent Claim
21 words
The method of claim 1 wherein the mixture of glass forming compounds decomposed in a flame is a mixture of halides.
Claim 3
Dependent Claim
19 words
The method of claim 3 wherein the mixture of halides includes silicon halide and at least one other halide.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein the oxide mixture formed in the flame is deposited on a support in particulate form and the body thus formed is subsequently vitrified by heat treatment.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the oxide mixture is vitrified in the flame and is deposited in vitreous form.
Claim 6
Dependent Claim
56 words
A method in accordance with claim 1 wherein silicon halide vapors are generated separately by passing a carrier gas through silicon halide and the stream of gas and vapors thus formed is mixed with the stream of gas and vapors generated in the heated chamber and the mixture is passed through the flame of combustible gas.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |