Patent US4521328A successfully refreshed from Google Patents.
US4521328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making carbon material
Assignee: Japan Kinoko Research Center Foundation
•
Filing: 1981-08-06
•
Granted: 1985-06-04
•
Expires: 2001-08-06
Abstract
Abstract A carbon material having oxygen impregnated therein, the oxygen being present in an amount of 10 to 100 ppm in the carbon material.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:28
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/04; B23H1/06; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/122; D01F11/16; D01F9/00; D01F9/08; D01F9/12; D06; D06M; D06M14/00; D06M14/36; H; H01; H01B; H01B1/00; H01B1/04; H01R; H01R39/00; H01R39/02; H01R39/18; H01R39/20; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
56 words
A method for the manufacture of an oxygen-impregnated carbon material, comprising the steps of: (a) impregnating carbonaceous particles with oxygen in an amount of 10 to 1000 ppm by subjecting said particles to a stream of ozone for a predetermined time period; and (b) sintering a mass of the oxygen-impregnated carbonaceous particles to form said material.
Claim 2
Independent Claim
56 words
A method for the manufacture of an oxygen-impregnated carbon material, comprising the steps of: (a) impregnating carbonaceous particles with oxygen in an amount of 10 to 1000 ppm by subjecting said particles to a stream of ozone for a predetermined time period; and (b) sintering a mass of the oxygen-impregnated carbonaceous particles to form said material.
Claim 3
Independent Claim
55 words
A method for the manufacture of an oxygen-impregnated carbon material, comprising the steps of: (a) impregnating carbonaceous particles with oxygen in an amount of 10 to 1000 ppm by subjecting said particles to a glow discharge in the presence of oxygen; and (b) sintering a mass of the oxygen-impregnated carbonaceous particles to form said material.
Claim 4
Independent Claim
55 words
A method for the manufacture of an oxygen-impregnated carbon material, comprising the steps of: (a) impregnating carbonaceous particles with oxygen in an amount of 10 to 1000 ppm by subjecting said particles to a glow discharge in the presence of oxygen; and (b) sintering a mass of the oxygen-impregnated carbonaceous particles to form said material.
Claim 5
Independent Claim
54 words
A method for the manufacture of an oxygen-impregnated carbon material, comprising the steps of: (a) impregnating carbonaceous particles with oxygen in an amount of 10 to 1000 ppm by subjecting said particles to ultraviolet radiation in the presence of oxygen; and (b) sintering a mass of the oxygen-impregnated carbonaceous particles to form said material.
Claim 6
Independent Claim
54 words
A method for the manufacture of an oxygen-impregnated carbon material, comprising the steps of: (a) impregnating carbonaceous particles with oxygen in an amount of 10 to 1000 ppm by subjecting said particles to ultraviolet radiation in the presence of oxygen; and (b) sintering a mass of the oxygen-impregnated carbonaceous particles to form said material.
Claim 7
Dependent Claim
27 words
A method according to claim 1, claim 2 or claim 3 wherein said particles comprise petroleum coke which are impregnated with oxygen while being mixed with tar.
Claim 8
Dependent Claim
31 words
A method according to claim 1, claim 2 or claim 3 wherein said particles are prepared by pulverizing a carbon fiber which has been prepared by drawing a heated carbon predecessor.
Claim 9
Dependent Claim
24 words
A method according to claim 5 wherein said particles are impregnated with oxygen by subjecting said carbon fiber being drawn to a glow discharge.
Claim 10
Dependent Claim
23 words
A method according to claim 5 wherein said particles are impregnated with oxygen by subjecting said carbon fiber being drawn to ultraviolet radiation.
Claim 11
Dependent Claim
30 words
A method according to any one of claim 1, claim 2 or claim 3 wherein said particles are so treated as to form an oxide layer on each individual particle.
References Cited (Backward Citations)
US4055628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |