US3009873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clarification of aqueous organic suspensions
Assignee: Dow Chemical Co
•
Filing: 1956-03-05
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Granted: 1961-11-21
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Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 Jack D Kerr
- 👤 Robert F Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:05
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF FACILITATING THE SEPARATION OF CLARIFIED WATER FROM AQUEOUS SUSPENSION OF FINELY DIVIDED ORGANIC SOLIDS WHICH COMPRISES TO STEP OF INCORPORATING IN THE SUSPENSION A WATER-SOLUBLE SULFONATE OF A HIGH MOLECULAR WEIGHT POLY(VINYL-AROMATIC) COMPOUND OF THE BENZENE SERIES IN AN AMOUNT SUFFICIENT TO CAUSE FLOCCULATION AND INCREASE THE RATE OF SEDIMENTATION OF THE SUSPENDED SOLIDS, SAID SULFONATE BEING CHARACTERIZED BY A SULFONATE VISCOSITY OF FROM ABOUT 100 TO 2000 CENTIPOISES AND DERIVED BY SULFONATION OF A BASE POLYMER HAVING A SOLUTION VISCOSITY OF FROM ABOUT 300 TO ABOUT 100,000 CENTIPOISES.
Claim 2
Independent Claim
92 words
A METHOD OF FACILITATING THE SEPARATION OF CLARIFIED WATER FROM AQUEOUS SUSPENSION OF FINELY DIVIDED ORGANIC SOLIDS WHICH COMPRISES TO STEP OF INCORPORATING IN THE SUSPENSION A WATER-SOLUBLE SULFONATE OF A HIGH MOLECULAR WEIGHT POLY(VINYL-AROMATIC) COMPOUND OF THE BENZENE SERIES IN AN AMOUNT SUFFICIENT TO CAUSE FLOCCULATION AND INCREASE THE RATE OF SEDIMENTATION OF THE SUSPENDED SOLIDS, SAID SULFONATE BEING CHARACTERIZED BY A SULFONATE VISCOSITY OF FROM ABOUT 100 TO 2000 CENTIPOISES AND DERIVED BY SULFONATION OF A BASE POLYMER HAVING A SOLUTION VISCOSITY OF FROM ABOUT 300 TO ABOUT 100,000 CENTIPOISES.
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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) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |