US3300407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dewatering an aqueous suspension of organic waste solids
Assignee: Dow Chemical Co
•
Filing: 1965-08-06
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Granted: 1967-01-24
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Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 Charles P Priesing
- 👤 Mogelnicki Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:31
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C02F1/5236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A PROCESS FOR DEWATERING AN AQUEOUS SUSPENSION OF FINELY-DIVIDED ORGANIC WASTE SOLIDS BY CONDITIONING THE AQUEOUS SUSPENSION WITH CHEMICAL ADDITIVES AND THEREAFTER FILTERING THE CONDITIONED SUSPENSION, THE IMPROVEMENT IN CONDITIONING THE AQUEOUS SUSPENSION WHICH CONSISTS ESSENTIALLY OF: (A) INTERMIXING WITH SAID AQUEOUS SUSPENSIN FROM ABOUT 0.01 TO 5 PARTS PER THOUSAND PARTS WASTE SOLIDS OF A WATER-SOLUBLE ANIONIC POLY(VINYLAROMATIC SULFONATE) HAVING AN AVERAGE MOLECULAR WEIGHT AS DETERMINED BY VISCOSITY MEASUREMENTS OF AT LEAST 0.5 MILLION, SAID POLYMER CONTAINING AS THE ANIONIC MOIETY AN AVERAGE OF AT LEAST 0.25 SULFONATE GROUPS PER MONOMER UNIT; AND (B) THEREAFTER ADDING TO SAID AQUEOUS SUSPENSION 5 TO 100 PARTS PER THOUSAND PARTS WASTE SOLIDS OF A PRIMARY INORGANIC COAGULANT.
Claim 2
Dependent Claim
116 words
IN A PROCESS FOR DEWATERING AN AQUEOUS SUSPENSION OF FINELY-DIVIDED ORGANIC WASTE SOLIDS BY CONDITIONING THE AQUEOUS SUSPENSION WITH CHEMICAL ADDITIVES AND THEREAFTER FILTERING THE CONDITIONED SUSPENSION, THE IMPROVEMENT IN CONDITIONING THE AQUEOUS SUSPENSION WHICH CONSISTS ESSENTIALLY OF: (A) INTERMIXING WITH SAID AQUEOUS SUSPENSIN FROM ABOUT 0.01 TO 5 PARTS PER THOUSAND PARTS WASTE SOLIDS OF A WATER-SOLUBLE ANIONIC POLY(VINYLAROMATIC SULFONATE) HAVING AN AVERAGE MOLECULAR WEIGHT AS DETERMINED BY VISCOSITY MEASUREMENTS OF AT LEAST 0.5 MILLION, SAID POLYMER CONTAINING AS THE ANIONIC MOIETY AN AVERAGE OF AT LEAST 0.25 SULFONATE GROUPS PER MONOMER UNIT; AND (B) THEREAFTER ADDING TO SAID AQUEOUS SUSPENSION 5 TO 100 PARTS PER THOUSAND PARTS WASTE SOLIDS OF A PRIMARY INORGANIC COAGULANT.
References Cited (Backward Citations)
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Cited
CA607440A
Cited
CA637703A
Cited
US3194757A
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US3009873A
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US3118832A
Cited
US3142638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |