US4399083A
Expired / Lapsed
US
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Method and apparatus for making a composite carbon material
Assignee: Japan Kinoko Research Center Foundation
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Filing: 1981-09-16
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Granted: 1983-08-16
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Expires: 2001-09-16
Abstract
Abstract A method of and an apparatus for making a composite carbon material from a precompact of granular carbons of different kinds or origins. A localized region of the carbon precompact is subjected to simultaneous heating by electric current flow from a current source at a temperature of 1800 DEG to 3500 DEG C. and pressurization at a pressure of 500 to 5000 kg/cm2, both being applied preferably impulsively. The localized region subjected to the simultaneous heating and pressurization is displaced so as to be controlledly crystallized and to control the formation of crystalline vacancies therein.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
105 words
A method of making a composite carbon material, comprising the steps of: (a) forming a precompact of granular carbons of different origins; (b) heating a localized region of said carbon precompact at a temperature between 1800° and 3500° C. while pressurizing said localized region at a pressure between 500 kg/cm 2 and 5000 kg/cm 2 in at least one direction; and (c) successively displacing, in a scanning manner, from one portion to another in said carbon precompact, said region subjected to simultaneous heating and pressurization in step (b) so as to controlledly crystallize said carbon precompact and to control the formation of crystalline vacancies therein.
Claim 2
Independent Claim
105 words
A method of making a composite carbon material, comprising the steps of: (a) forming a precompact of granular carbons of different origins; (b) heating a localized region of said carbon precompact at a temperature between 1800° and 3500° C. while pressurizing said localized region at a pressure between 500 kg/cm 2 and 5000 kg/cm 2 in at least one direction; and (c) successively displacing, in a scanning manner, from one portion to another in said carbon precompact, said region subjected to simultaneous heating and pressurization in step (b) so as to controlledly crystallize said carbon precompact and to control the formation of crystalline vacancies therein.
Claim 3
Dependent Claim
20 words
The method defined in claim 1 wherein in step (b), said localized region of the carbon precompact is heated impulsively.
Claim 4
Dependent Claim
32 words
The method defined in claim 2 wherein said localized region is heated impulsively by applying at least one electrical pulse of high amperage directly through said carbon precompact along said localized region.
Claim 5
Dependent Claim
25 words
The method defined in claim 1, claim 2 or claim 3 wherein in step (b), said localized region of the carbon precompact is pressurized impulsively.
Claim 6
Dependent Claim
29 words
The method defined in claim 1, claim 2 or claim 3, further comprising the step of applying an ultasonic vibrational energy to said localized region of the carbon precompact.
Claim 7
Dependent Claim
20 words
The method defined in claim 5 wherein said ultrasonic vibrational energy is of a frequency between 15 and 50 kHz.
Claim 8
Dependent Claim
21 words
The method defined in claim 1, claim 2 or claim 3 wherein said pressure is reduced periodically at an ultrasonic frequency.
Claim 9
Dependent Claim
15 words
The method defined in claim 7 wherein said frequency is between 15 and 50 kHz.
Claim 10
Dependent Claim
35 words
The method defined in claim 1, further comprising the step of furnishing an aqueous vapor atmosphere to at least said localized region of the carbon precompact subjected to simultaneous heating and pressurization in step (b).
Claim 11
Dependent Claim
33 words
The method defined in claim 1, further comprising the step of pressuring said localized region of the carbon precompact sequentially in one direction and at least another direction orthogonal to said one direction.
Claim 12
Independent Claim
103 words
An apparatus for making a composite carbon material, comprising: means for retaining a precompact of granular carbons of different origins; means for heating a localized region of the carbon precompact at a temperature between 1800 and 3500° C.; pressure means for pressurizing said localized region under a pressure between 500 and 5000 kg/cm 2 while said region is being heated by said heating means; and drive means for displacing, in a scanning manner, said localized region of the carbon precompact subjected to the simultaneous heating and pressurization so as to controlledly crystallize said region and to control the formation of crystalline vacancies therein.
Claim 13
Independent Claim
103 words
An apparatus for making a composite carbon material, comprising: means for retaining a precompact of granular carbons of different origins; means for heating a localized region of the carbon precompact at a temperature between 1800 and 3500° C.; pressure means for pressurizing said localized region under a pressure between 500 and 5000 kg/cm 2 while said region is being heated by said heating means; and drive means for displacing, in a scanning manner, said localized region of the carbon precompact subjected to the simultaneous heating and pressurization so as to controlledly crystallize said region and to control the formation of crystalline vacancies therein.
Claim 14
Dependent Claim
30 words
The apparatus defined in claim 11 wherein said heating means comprises a power supply for passing electrical pulses of high amperage directly through said localized region of the carbon precompact.
Claim 15
Independent Claim
123 words
A method of making a composite carbon material, comprising the steps of: (a) forming a precompact of granular carbons of different origins; (b) heating a localized region of said carbon precompact at a temperature between 1800° and 3500° C. while pressurizing said localized region at a pressure between 500 kg/cm 2 and 5000 kg/cm 2 in at least one direction; (c) successively displacing, in a scanning manner, from one portion to another in said carbon precompact, said region of the carbon precompact subjected to simultaneous heating and pressurization in step (b) so as to controlledly crystallize said carbon precompact and to control the formation of crystalline vacancies therein; and (d) applying an ultrasonic vibrational energy to said localized region of the carbon precompact.
Claim 16
Independent Claim
123 words
A method of making a composite carbon material, comprising the steps of: (a) forming a precompact of granular carbons of different origins; (b) heating a localized region of said carbon precompact at a temperature between 1800° and 3500° C. while pressurizing said localized region at a pressure between 500 kg/cm 2 and 5000 kg/cm 2 in at least one direction; (c) successively displacing, in a scanning manner, from one portion to another in said carbon precompact, said region of the carbon precompact subjected to simultaneous heating and pressurization in step (b) so as to controlledly crystallize said carbon precompact and to control the formation of crystalline vacancies therein; and (d) applying an ultrasonic vibrational energy to said localized region of the carbon precompact.
Claim 17
Dependent Claim
20 words
The method defined in claim 13 wherein said ultrasonic vibrational energy is of a frequency between 15 and 50 kHz.
Claim 18
Dependent Claim
16 words
The method defined in claim 13 wherein said pressure is reduced periodically at an ultrasonic frequency.
Claim 19
Dependent Claim
15 words
The method defined in claim 15 wherein said frequency is between 15 and 50 kHz.
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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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |