US3565345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of an article of high purity metal oxide
Assignee: Texas Instruments Inc
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Filing: 1968-07-11
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Granted: 1971-02-23
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Expires: 1988-07-11
Abstract
Abstract A torch is provided for decomposing a volatile metal chloride by hydrolysis to directly form an oxide article on a mandrel. The torch includes a nozzle which provides an output jet stream of vaporized metal chloride. Sheath openings in the nozzle provide a supply of gas which is relatively inert with respect to the gaseous metal chloride for preventing reaction immediately adjacent the nozzle face. A plurality of slanted nozzle openings are provided in the nozzle for directing angled streams of combustible gas through the sheath stream at a selected region for reaction with the jet stream of gaseous metal chloride. When the gas streams are ignited, a torch flame is provided which may be directly impinged upon a mandrel in order to directly form an oxide article of high purity thereon.
Inventors
- 👤 Herbert John Moltzan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:39
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/48; F23D14/52; C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C03; C03B; C03B19/00; C03B19/14; C03B19/1415; C03B19/1423; C03C; C03C3/00; C03C3/04; C03C3/06; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5025; C03C2201/00; C03C2201/02; C03C2203/00; C03C2203/40; C03C2203/42; C03C2203/44; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
24 words
The torch of claim 1 wherein said volatile metal chloride comprises silicon tetrachloride and said combustible gas comprises a mixture of oxygen and hydrogen.
Claim 2
Dependent Claim
42 words
The torch of claim 1 wherein said nozzle aperture is circular, said opening in said second chamber is an annular opening concentrically disposed about said nozzle aperture, and said slanted nozzle openings are circular and are disposed symmetrically about said annular opening.
Claim 3
Dependent Claim
36 words
The torch of claim 3 and further comprising at least six slanted nozzle openings disposed in a circle about said annular opening, each of said nozzle openings having an area no greater than said nozzle aperture.
Claim 4
Dependent Claim
28 words
The torch of claim 1 wherein said slanted nozzle openings slope toward the axis of said jet stream at an angle within the range of 2* to 30*.
Claim 5
Dependent Claim
27 words
The torch of claim 1 and further comprising a chamber enclosing said second chamber and having inlet and outlet means for circulation of a cooling fluid therethrough.
Claim 6
Dependent Claim
19 words
The torch of claim 1 wherein said slanted nozzle openings are defined in nozzle removable from said torch housing.
Claim 7
Dependent Claim
185 words
A torch for forming a silica article directly upon a mandrel by hydrolysis of silicon tetrachloride entrained in a carrier gas comprising: a. a torch housing having a central passage therethrough with an inlet for receiving gaseous silicon tetrachloride entrained in a carrier gas and having a nozzle aperture to provide an output jet stream of gaseous silicon tetrachloride entrained in a carrier gas; b. a sheath chamber defined in said torch housing including an inlet for receiving a relatively inert gas and having an annular opening disposed about said nozzle aperture to provide a circular stream of said inert gas around said jet stream; and c. a mixing chamber disposed about said sheath chamber including inlets for combustible gases and a plurality of outlet openings slanted toward the axis of said jet stream, each alternate outlet opening having a substantially different slant angle from that of adjacent openings, to penetrate said circular stream at a selected region for reaction with said jet stream, whereby a silica article may be formed by directly impinging the flame resulting from ignition of said torch on the mandrel.
Claim 8
Dependent Claim
31 words
The torch of claim 8 wherein said outlet openings from said mixing chamber slant towards the axis of said jet sTream at an angle within the range of 2* to 30*.
Claim 9
Dependent Claim
21 words
The torch of claim 9 comprising at least six said outlet openings disposed in a circular configuration around said nozzle aperture.
References Cited (Backward Citations)
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |