Patent US3203874A successfully refreshed from Google Patents.
US3203874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of values from coke oven like gases
Assignee: Individual
•
Filing: 1962-07-06
•
Granted: 1965-08-31
•
Expires: 1982-07-06
Abstract
No abstract record available.
Inventors
- 👤 Robert L Somerville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:00
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/005; C07C37/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE PROCESS OF RECOVERING A PHENOL FRACTION AND A DIHYDROXYBENZENE FRACTIN FROM COKE OVER GAS WHICH COMPRISES: A. CONTAINING HOT COKE OVEN GAS CONTAINING A PHENOL FRACTION AND A HIDYDROXYBENZENE FRACTION WITH WATER IN A SCRUBBING ZONE TO FORM A WARM AQUEOUS LIQUOR CONTAINING SAID FRACTIONS, B. WITHDRAWING THE WARM LIQUOR FROM THE SCRUBBING ZONE, C. INTRODUCING THE LIQUOR WHILE WARM INTO A VACUUM DISTILLATION ZONE TO SEPARATE THEREFROM THE PHENOL FRACTION, AS A VAPOR PHASE WHEREBY HEAT FROM THE COKE OVEN GAS IMPARTED TO THE LIQUOR IN THE SCRUBBING ZONE IS UTILIZED FOR THE DISTILLATION IN THE VACUUM DISTILLATION ZONE, D. AND SEPARATING FROM THE LIQUOR A PORTION THEREOF AS THE DIHYDROXYBENZENE FRACTION, E. RETURNING THE LIQUOR TO THE SCRUBBING ZONE.
Claim 2
Dependent Claim
122 words
THE PROCESS OF RECOVERING A PHENOL FRACTION AND A DIHYDROXYBENZENE FRACTIN FROM COKE OVER GAS WHICH COMPRISES: A. CONTAINING HOT COKE OVEN GAS CONTAINING A PHENOL FRACTION AND A HIDYDROXYBENZENE FRACTION WITH WATER IN A SCRUBBING ZONE TO FORM A WARM AQUEOUS LIQUOR CONTAINING SAID FRACTIONS, B. WITHDRAWING THE WARM LIQUOR FROM THE SCRUBBING ZONE, C. INTRODUCING THE LIQUOR WHILE WARM INTO A VACUUM DISTILLATION ZONE TO SEPARATE THEREFROM THE PHENOL FRACTION, AS A VAPOR PHASE WHEREBY HEAT FROM THE COKE OVEN GAS IMPARTED TO THE LIQUOR IN THE SCRUBBING ZONE IS UTILIZED FOR THE DISTILLATION IN THE VACUUM DISTILLATION ZONE, D. AND SEPARATING FROM THE LIQUOR A PORTION THEREOF AS THE DIHYDROXYBENZENE FRACTION, E. RETURNING THE LIQUOR TO THE SCRUBBING ZONE.
References Cited (Backward Citations)
US1566796A
Cited
US1566795A
Cited
US1595603A
Cited
US1595604A
Cited
US1905108A
Cited
US1856690A
Cited
US2086856A
Cited
US2056748A
Cited
FR880100A
Cited
US2409773A
Cited
US2381209A
Cited
US2451332A
Cited
US2445825A
Cited
GB636704A
Cited
US2573244A
Cited
US2675412A
Cited
US2815389A
Cited
US2727130A
Cited
US2770576A
Cited
US2807654A
Cited
US3043883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |