US3248303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activatable coke from carbonaceous residues
Assignee: Witco Corp
•
Filing: 1964-05-01
•
Granted: 1966-04-26
•
Expires: 1984-05-01
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Doying
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:13
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/023; C10B; C10B57/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR MAKING AN ACTIVATABLE COKE WHICH COMPRISES PROVIDING A TARRY, PITCH-LIKE, CARBONACEOUS RESIDUE; MIXING THEREWITH A SULFUR-CONTAINING CARBONIZING AGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR, SULFURIC ACID, POTASSIUM THIOCYANATE, AND POTASSIUM SULFIDE; AND SLOWLY HEATING THE THUS-FORMED MIXTURE TO A TEMPERATURE OF AT LEAST ABOUT 450*C. TO ABOUT 500*C. SO AS TO EXPEL THE VOLATILES CONTAINED THEREIN AND TO CARBONIZE THE RESIDUE.
Claim 2
Dependent Claim
65 words
A PROCESS FOR MAKING AN ACTIVATABLE COKE WHICH COMPRISES PROVIDING A TARRY, PITCH-LIKE, CARBONACEOUS RESIDUE; MIXING THEREWITH A SULFUR-CONTAINING CARBONIZING AGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR, SULFURIC ACID, POTASSIUM THIOCYANATE, AND POTASSIUM SULFIDE; AND SLOWLY HEATING THE THUS-FORMED MIXTURE TO A TEMPERATURE OF AT LEAST ABOUT 450*C. TO ABOUT 500*C. SO AS TO EXPEL THE VOLATILES CONTAINED THEREIN AND TO CARBONIZE THE RESIDUE.
References Cited (Backward Citations)
US1756234A
Cited
US1813341A
Cited
US2201050A
Cited
US2234769A
Cited
US2377063A
Cited
US2314641A
Cited
US2585454A
Cited
US2725360A
Cited
US2829115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |