US3804664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for chemical vapor deposition of zirconium carbide
Assignee: Japan Atomic Energy Agency
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Filing: 1971-09-20
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Granted: 1974-04-16
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Expires: 1991-09-20
Abstract
Abstract Deposition of zirconium carbide on a substrate is advantageously effected by reacting zirconium and methyl iodide under heating. The deposition of zirconium carbide is useful for coating of a rocket nozzle surface, coating of granular fuels for gas cooled nuclear reactor and the like.
Inventors
- 👤 K Iwamoto
- 👤 K Ikawa
- 👤 F Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:57
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
30 words
A process of claim 1, which comprises pyrolyzing methyl iodide, reacting the resulting iodine with zirconium; and subjecting the mixture of reaction products to pyrolysis and deposition on a substrate.
Claim 2
Dependent Claim
15 words
A process of claim 1, in which an inert gas is employed as carrier gas.
Claim 3
Dependent Claim
12 words
A process of claim 3, in which the inert gas is argon.
Claim 4
Dependent Claim
46 words
The process of claim 1, in which the deposition is carried out by using an apparatus comprising a reaction zone and a deposition zone connected to the reaction zone, said reaction being effected in the reaction zone and said deposition being effected in the deposition zone.
Claim 5
Dependent Claim
29 words
A process of claim 5, in which the apparatus is operated at about 600* - 850*C for the reaction zone and at about 900* -1400*C for the deposition zone.
Claim 6
Dependent Claim
18 words
The process of claim 5, in which the apparatus is operated at about 700*-800*C for the reaction zone.
Claim 7
Dependent Claim
14 words
The process of claim 1, in which zirconium sponge is employed as said zirconium.
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |