US2808375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol removal from phenol-contaminated waste waters
Assignee: Jones and Laughlin Steel Corp
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Filing: 1954-05-10
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Granted: 1957-10-01
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Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Dan P Manka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:08
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/26; C02F2101/00; C02F2101/30; C02F2101/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
THE PROCESS OF REMOVING PHENOLS FROM PHENOL-ONTAMINATED WASTE WATER COMPRISING THE PH OF SAID WASTE WATERS TO A VALUE IN THE RANGE FROM ABOUT 6.5 TO ABOUT 9.5, BRINGING SAID WASTE WATERS INTO IMTIMATE CONTACT WITH A SUBSTANTIALLY EQUAL VOLUME OF AN AROMATIC HYDROCARBON SOLVENT FOR PHENOLS CONTAINING BETWEEN ABOUT 1% AND ABOUT 2% BY VOLUME OF DEHYDROABIETYLAMINE, WHEREBY SAID PHENOLS ARE DISSOLVED IN SAID SOLVENT, AND SEPARATING SAID PHENOL-BEARING SOLVENT FROM THE WASTE WATERS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |