US2763580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activated carbon treatment of sugar liquors and regeneration
Assignee: Pittsburgh Coke and Chemical Co
•
Filing: 1951-01-29
•
Granted: 1956-09-18
•
Expires: 1971-01-29
Abstract
No abstract record available.
Inventors
- 👤 Zabor John William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:38
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/12; C13B20/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR THE PURIFICATION AND DECOLORIZATION OF SUGAR LIQUORS WHICH COMPRISES PASSING AN AQUEOUS SUGAR LIQUOR HAVING A SOLIDS CONTENT OF AT LEAST 10% BY WEIGHT AND AT A TEMPERATURE ABOVE ABOUT 125* F. THROUGH A BED OF GRANULAR ACTIVATED CARBON OF PARTICLE SIZE BETWEEN 4 AND 60 MESH FOR A TIME SUFFICIENT TO PURIFY AND DECOLORIZE THE LIQUOR, SAID CARBON PARTICLES HAVING A C. W. S. HARDNESS NUMBER BETWEEN 60 AND 98 AND A MOLASSES NUMBER BETWEEN 150 AND 400, SAID CARBON BEING SELECTED FROM THE GROUP CONSISTING OF (1) A CARBON ACTIVATED BY HEATING PETROLEUM COKE IN AN ATMOSPHERE OF FLUE GAS ENRICHED WITH STEAM AT A TEMPERATURE OF 1500* TO 2000* F. AND (2) A CARBON ACTIVATED BY HEATING A COAL IN AN OXIDIZING ATMOSPHERE BELOW 600* F., DEVOLATILIZING BY HEATING AT
Claim 2
Dependent Claim
136 words
A PROCESS FOR THE PURIFICATION AND DECOLORIZATION OF SUGAR LIQUORS WHICH COMPRISES PASSING AN AQUEOUS SUGAR LIQUOR HAVING A SOLIDS CONTENT OF AT LEAST 10% BY WEIGHT AND AT A TEMPERATURE ABOVE ABOUT 125* F. THROUGH A BED OF GRANULAR ACTIVATED CARBON OF PARTICLE SIZE BETWEEN 4 AND 60 MESH FOR A TIME SUFFICIENT TO PURIFY AND DECOLORIZE THE LIQUOR, SAID CARBON PARTICLES HAVING A C. W. S. HARDNESS NUMBER BETWEEN 60 AND 98 AND A MOLASSES NUMBER BETWEEN 150 AND 400, SAID CARBON BEING SELECTED FROM THE GROUP CONSISTING OF (1) A CARBON ACTIVATED BY HEATING PETROLEUM COKE IN AN ATMOSPHERE OF FLUE GAS ENRICHED WITH STEAM AT A TEMPERATURE OF 1500* TO 2000* F. AND (2) A CARBON ACTIVATED BY HEATING A COAL IN AN OXIDIZING ATMOSPHERE BELOW 600* F., DEVOLATILIZING BY HEATING AT
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |