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 Title: |
US5510098:
CVD method of producing and doping fullerenes
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Chow, Lee; Orlando, FL
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| Assignee: |
University of Central Florida, Orlando, FL
other patents from UNIVERSITY OF CENTRAL FLORIDA (599435) (approx. 135)
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| Published / Filed: |
1996-04-23
/ 1994-01-03
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| Application Number: |
US1994000176543
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| IPC Code: |
Advanced:
C01B 31/02;
Core:
C01B 31/00;
IPC-7:
C01B 31/00;
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| ECLA Code: |
C01B31/02B;
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| U.S. Class: |
Current:
423/445.B;
423/262;
423/263;
423/439;
423/446;
977/843;
Original:
423/445.B;
423/446;
423/262;
423/263;
423/439;
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| Field of Search: |
423/446,445 B,262,263,439
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| Priority Number: |
| 1994-01-03 |
US1994000176543 |
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| Abstract: |
Methods of producing fullerenes in large-macroscopic quantities inexpensively is disclosed without using solid carbon material such as graphite. In a preferred embodiment, fullerenes are formed by a hot filament CVD procedure. The fullerenes occur in the soot that forms as a by-product on the edges of the substrate holder. Mass spectrum of soot deposits shows lines corresponding to C60. From the typical concentrations of gaseous species in the diamond-growing CVD chamber, hydrocarbon species including CH3 or C2 H2 can be the precursors for the formation of fullerenes in the CVD chamber. A method of using fullerenes to enhance the properties of rubber composites is also described.
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| Attorney, Agent or Firm: |
Steinberger, Brian S. ;
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| Primary / Asst. Examiners: |
Lewis, Michael; DiMauro, Peter T.
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| Maintenance Status: |
E3 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 15 claims |
I claim:
1. A method of producing fullerenes using an electrically heated metal filament to deposit soot containing fullerenes on a substrate within a Chemical Vapor Deposition chamber, comprising the steps of:
- (a) feeding and mixing, under fullerene growth conditions to increase the yield of fullerenes-containing soot, approximately 0.5 to 2% CH4 gas with approximately 98 to 99.5% H2 gas into a Chemical Vapor Deposition chamber containing a substrate and a metal filament;
- (b) raising the temperature of the metal filament in the chamber to approximately 2200 degrees C.;
- (c) maintaining the temperature of the substrate to be between approximately 900 to 950 degrees C.;
- (d) collecting soot from the substrate in the chamber; and
- (e) extracting fullerenes from the collected soot.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 6 U.S. patent(s) that reference this one
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| Foreign References: |
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| Other Abstract Info: |
CHEMABS 124(26)356761A
CAN124(26)356761A
DERABS C96-221200
DERC96-221200
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| Other References: |
Dai, G., et al. "A New Technique for Synthesizing Fullerene C60", in `Gaoden Xuexiao Huaxve Xueba`, vol. 13, #7 (1992), pp. 893-894.
Chemical Abstracts, vol. 118, #237042d (1993).
Patent Abstracts of Japan, vol. 17, #259, (C-1061), May 21, 1993, abstract for Sumino, JP-05-4810 (14 Jan. 1993).
Powell, C. F., et al. "Vapor-plating: The Formation of Coatings by Vapor Deposition Techniques", John Wiley: New York, 1955, pp. 1-13 and 71.
Howard et al., Fullerenes C60 and C70 in flames, Nature, vol. 352 Jul. 11, 1991.
Kratschmer et al., Solid C60: a new form of carbon, Nature, vol. 347, Sep. 27, 1990, pp. 354-358.
(5 pages)
Cited by 56 patents
Kroto et al., C60: Buckminsterfullerene, Nature, vol. 318, Nov. 15, 1985, pp. 162-163.
(2 pages)
Cited by 33 patents
McKinnon et al., Combustion Synthesis of Fullerenes, Combustion And Flame 88: 1992, pp. 102-112.
(11 pages)
Cited by 8 patents
[ISI abstract]
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