US3835046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewatering of aqueous suspensions
Assignee: Zeneca Inc
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Filing: 1972-02-14
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Granted: 1974-09-10
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Expires: 1992-02-14
Abstract
Abstract A PROCESS IS PROVIDED FOR DEWATERING AQUEOUS SUSPENSIONS OF SOLID MATERIALS WHICH COMPRISIES MIXING INTO SUCH A SUSPENSION A WATER-SOLUBLE, CATIONIC POLYMER OF N-VINYL IMIDAZOLE OR SALT THEREOF, THE AMOUNT OF N-VINYL IMIDAZOLE POLYMER EMPLOYED BEING SUFFICIENT TO CONDITION THE SUSPENSION FOR DEWATERING AND SEPARATING WATER FROM THE CONDITIONED SUSPENSION.
Inventors
- 👤 A Restaino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:01
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |