Patent US3219731A successfully refreshed from Google Patents.
US3219731A
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Process for preparing porous shaped structures of carbon or graphite
Assignee: Hoechst AG
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Filing: 1963-10-08
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Granted: 1965-11-23
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Expires: 1983-10-08
Abstract
No abstract record available.
Inventors
- 👤 Etzel Karl Wilhelm Friedrich
- 👤 Bauer Peter Johannes Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C01; C01B; C01B32/00; C04B35/522; C04B38/00; C04B38/0022; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645; C04B38/068; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/42; C04B2235/422; C04B2235/424; C04B2235/70; C04B2235/74; C04B2235/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR THE PREPARATION SHAPED STRUCTURES OF COAL HAVING A BULK DENSITY BETWEEN ABOUT 0.9 AND 1.1 G./CC. AND AN ACCESSIBLE VOLUME OF PORES BETWEEN ABOUT 45 TO 55 PERCENT WHICH COMPRISES SHAPING A MIXTURE OF COKE AND CARBON BLACK TOGETHER WITH A MIXTURE OF PITCH AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF RESIN AND FURFURYL ALCOHOL AND CALCINING THE RESULTING SHAPED STRUCTURE AT ABOUT 1000*C.
Claim 2
Dependent Claim
69 words
A PROCESS FOR THE PREPARATION SHAPED STRUCTURES OF COAL HAVING A BULK DENSITY BETWEEN ABOUT 0.9 AND 1.1 G./CC. AND AN ACCESSIBLE VOLUME OF PORES BETWEEN ABOUT 45 TO 55 PERCENT WHICH COMPRISES SHAPING A MIXTURE OF COKE AND CARBON BLACK TOGETHER WITH A MIXTURE OF PITCH AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF RESIN AND FURFURYL ALCOHOL AND CALCINING THE RESULTING SHAPED STRUCTURE AT ABOUT 1000*C.
References Cited (Backward Citations)
CA656694A
Cited
US1856680A
Cited
US2088422A
Cited
US2066176A
Cited
GB717050A
Cited
US2997744A
Cited
DE1117028B
Cited
US3084394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |