US2757797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treatment
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-03-27
•
Granted: 1956-08-07
•
Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Herman K Eckert
- 👤 John G Mcquarrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:10
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/08; C; C02; C02F; C02F1/00; C02F1/24; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR THE REMOVAL OF DISPERSED CARBON BLACK FROM WATER CONTAMINATED THEREWITH WHICH COMPRISES INTRODUCING INERT GAS UNDER A PRESSURE IN THE RANGE FROM 1 TO 50 P.S. I. G. INTO SAID WATER, DEGASIFYING SAID TREATED WATER IN A FLOTATION TANK BY RELEASING PRESSURE TO APPROXIMATELY ATMOSPHERIC PRESSURE SO THAT THE MAJORITY OF SUSPENDED PARTICLES ARE SEPARATED FROM THE SOLUTION AND RISE TO THE SURFACE OF THE WATER FORMING A SLUDGE THEREON, REMOVING SAID SLUDGE INTO A SLUDGE-COLLECTING BASIN BY MEANS OF MECHANICAL SCRAPERS TREATING
Claim 2
Dependent Claim
86 words
A PROCESS FOR THE REMOVAL OF DISPERSED CARBON BLACK FROM WATER CONTAMINATED THEREWITH WHICH COMPRISES INTRODUCING INERT GAS UNDER A PRESSURE IN THE RANGE FROM 1 TO 50 P.S. I. G. INTO SAID WATER, DEGASIFYING SAID TREATED WATER IN A FLOTATION TANK BY RELEASING PRESSURE TO APPROXIMATELY ATMOSPHERIC PRESSURE SO THAT THE MAJORITY OF SUSPENDED PARTICLES ARE SEPARATED FROM THE SOLUTION AND RISE TO THE SURFACE OF THE WATER FORMING A SLUDGE THEREON, REMOVING SAID SLUDGE INTO A SLUDGE-COLLECTING BASIN BY MEANS OF MECHANICAL SCRAPERS TREATING
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |