Patent US3663171A successfully refreshed from Google Patents.
US3663171A
Expired / Lapsed
US
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Method of manufacturing unitary porous carbon bodies
Assignee: Coal Industry Patents Ltd
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Filing: 1970-07-24
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Granted: 1972-05-16
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Expires: 1990-07-24
Abstract
Abstract A method for the manufacture of the porous carbon body comprises sintering a particulate pitch-like material, for example an extract or solution of coal, at a temperature below that at which the material melts to produce a green compact, oxidizing the green compact to stabilize the green compact to heat treatment, and carbonizing the stabilized green compact.
Inventors
- 👤 Anthony F Granger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:51
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/56; C04B35/622; C04B35/64; C04B35/645; C04B38/00; C04B38/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
16 words
A method as claimed in claim 1 wherein said pitch-like material is an extract of coal.
Claim 2
Dependent Claim
14 words
A method as claimed in claim 1 wherein said pitch-like material is coal-tar pitch.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1 wherein said step of sintering said particulate pitch-like material is carried out under pressure.
Claim 4
Dependent Claim
19 words
A method as claimed in claim 1, wherein the source of said pitch-like material is a solution of coal.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 1, wherein said pitch-like material is petroleum pitch.
Claim 6
Independent Claim
104 words
A method for the manufacture of a porous carbon body which comprises sintering a particulate pitch-like material at a temperature below that at which said particulate pitch-like material melts whereby a green compact is produced, oxidizing said green compact with a gas containing molecular oxygen whereby said green compact is stabilized to heat treatment, heating said stabilized green compact to a temperature of about 400* C to 600* C in an atmosphere containing molecular oxygen, carbonizing said stabilized, heat-treated green compact to form the porous carbon body, and activating porous carbon body by heating in steam at about 800* C to about 950* C.
References Cited (Backward Citations)
US3558276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |