US3811930A
Expired / Lapsed
US
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Process for pyrolytic deposition of boron on a metal substrate
Assignee: RTX Corp
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Filing: 1969-11-24
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Granted: 1974-05-21
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Expires: 1989-11-24
Abstract
Abstract This invention provides a process for the pyrolytic deposition of boron on a substrate comprising bringing a pyrolytically decomposable gaseous boron-containing compound and a pyrolytically decomposable metal-containing gas into contact with a substrate, including a reducing gas at an elevated temperature sufficient to pyrolytically decompose both the boron-containing compound and the metal-containing gas, whereby the boron is deposited on the substrate at a rate higher than could be obtained in the absence of the metal-containing gas.
Inventors
- 👤 D Kuehl
- 👤 R Fanti
- 👤 S Galasso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:02
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/28; C23C16/30; C23C16/38; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A process for the pyrolytic deposition of boron on a substrate according to claim 1 wherein the substrate is a filament of a material selected from the group consisting of tantalum, titanium, tungsten, zirconium and graphite.
Claim 2
Dependent Claim
49 words
A process for the pyrolytic deposition of boron on a metallic substrate accorDing to claim 1 wherein the reactants include 23 to 45 mol percent of boron trichloride, as the boron-containing gas, and hydrogen, wherein the temperature is 1,100* to 1,350*C., and wherein the substrate is a tungsten filament.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |