US3288707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewatering aqueous suspensions
Assignee: Rohm and Haas Co
•
Filing: 1964-12-03
•
Granted: 1966-11-29
•
Expires: 1984-12-03
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Hurwitz
- 👤 Aschkenasy Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:30
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; Y; Y10; Y10S; Y10S524/00; Y10S524/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE PROCESS OF FACILITATING THE DEWATERING OF AN AQUEOUS SUSPENSION OF FINELY-DIVIDED WATER-INSOLUBLE SOLID MATERIALS WHICH COMPRISES MIXING INTO SUCH A SUSPENSION HAVING PH OF ABOUT 0 TO ABOUT 10, FROM 0.001% TO 5% BY WEIGHT, BASED ON THE WEIGHT OF SUSPENDED MATTER, OF A WATER-SOLUBLE POLYMER HAVING A MOLECULAR WEIGHT FROM ABOUT 10,000 TO 10,000,000 VISCOSITY AVERAGE SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE POLYMERS, AND SALTS THEREOF, CONTAINING AT LEAST 50 MOLES PERCENT OF UNITS OF THE FORMULA
Claim 2
Dependent Claim
80 words
THE PROCESS OF FACILITATING THE DEWATERING OF AN AQUEOUS SUSPENSION OF FINELY-DIVIDED WATER-INSOLUBLE SOLID MATERIALS WHICH COMPRISES MIXING INTO SUCH A SUSPENSION HAVING PH OF ABOUT 0 TO ABOUT 10, FROM 0.001% TO 5% BY WEIGHT, BASED ON THE WEIGHT OF SUSPENDED MATTER, OF A WATER-SOLUBLE POLYMER HAVING A MOLECULAR WEIGHT FROM ABOUT 10,000 TO 10,000,000 VISCOSITY AVERAGE SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE POLYMERS, AND SALTS THEREOF, CONTAINING AT LEAST 50 MOLES PERCENT OF UNITS OF THE FORMULA
References Cited (Backward Citations)
US2881171A
Cited
US2875062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |