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Patent US5296274A successfully refreshed from Google Patents.
US5296274A
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US
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Method of producing carbon-containing materials by electron beam vacuum evaporation of graphite and subsequent condensation
Assignee: Individual
•
Filing: 1989-05-10
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Granted: 1994-03-22
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Expires: 2009-05-10
Abstract
Abstract A method of producing carbon-containing materials, residing in that, prior to electron-beam vacuum evaporation of graphite, on the surface of the graphite there is disposed a transition metal of Groups VI-VIII of the Periodic System or a mixture of at least two transition metals of said Groups, ensuring a higher rate of evaporation of graphite with respect to said metals or mixture, the metal or mixture is melted by an electron beam (10), evaporation of the graphite proceeding through the resulting melt (11) with subsequent condensation of the graphite on a support (4). In the course of gradual consumption of the graphite and said metal or mixture their supply into the resulting melt (11) is effected in such a manner that the consumed surface of the graphite should be completely overlapped by the melt (11).
Inventors
- 👤 Boris A. Movchan
- 👤 Nikolai I. Grechanjuk
- 👤 Jury B. Chuikov
- 👤 Boris E. Paton
- 👤 Vladimir V. Stetsenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:48
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0605; C23C14/22; C23C14/24; C23C14/246; C23C14/28; C23C14/30; C25; C25C; C25C3/00; C25C3/06; C25C3/16; C25C7/00; C25C7/02; C25C7/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A method of producing carbon-containing materials, comprising electron-beam vacuum evaporation of graphite with subsequent condensation thereof onto a support, comprising, prior to the electron-beam evaporation of the surface of the graphite, disposing at least one transition metal selected from Groups VI, VII and VIII of the Periodic System on the surface of the graphite, directing the electron-beam onto the transition metal and the graphite surface thereunder, thereby melting the transition metal and evaporating the graphite surface, and condensing the evaporated material onto the support.
Claim 2
Independent Claim
84 words
A method of producing carbon-containing materials, comprising electron-beam vacuum evaporation of graphite with subsequent condensation thereof onto a support, comprising, prior to the electron-beam evaporation of the surface of the graphite, disposing at least one transition metal selected from Groups VI, VII and VIII of the Periodic System on the surface of the graphite, directing the electron-beam onto the transition metal and the graphite surface thereunder, thereby melting the transition metal and evaporating the graphite surface, and condensing the evaporated material onto the support.
Claim 3
Dependent Claim
25 words
A method according to claim 1, characterized in that tungsten or molybdenum is used as a transition metal of Groups VI-VIII of the Periodic System.
Claim 4
Dependent Claim
41 words
A method according to claim 1, characterized in that a mixture of tungsten and molybdenum, for example, in the atomic ratio of 1:1, is used as a mixture of at least two transition metals of Groups VI-VIII of the Periodic System.
Claim 5
Dependent Claim
20 words
A method according to claim 1, comprising carrying out partial ionization of the evaporated material in an arc discharge plasma.
Claim 6
Dependent Claim
14 words
A method according to claim 4, comprising feeding a negative potential to the support.
Claim 7
Dependent Claim
35 words
A method according to claim 4 comprising, simultaneously with the electron-beam evaporation of graphite, carrying out electron-beam evaporation of titanium or silicon and effecting a joint condensation of all evaporated components onto a common support.
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) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |