US3575854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid setiling of gelatinous precipitates
Assignee: M&T Chemicals Inc
•
Filing: 1969-04-14
•
Granted: 1971-04-20
•
Expires: 1989-04-14
Abstract
Abstract A PROCESS IS PROVIDED FOR THE RAPID SETTLING OF GELATINOUS, FLOCCULENT PRECIPITATES OF HYDROUS HEAVY METAL OXIDES FROM WASTE EFFLUENT STREAMS BY PRECIPITATING THE METALS PRESENT IN THE STREAMS AS HYDROXIDES IN THE PRESENCE OF A SUSPENDED, FINELY DIVIDED HEAVY SOLID SETTLING AGENT WHICH IS INSOLUBLE IN AQUEOUS MEDIUM AND WHICH HAS A MINIMUM SPECIFIC GRAVITY OF 3.5, THE WEIGHT RATIO OF THE SETTLING AGENT TO METAL CONTENT OF THE PRECIPITATE BEING A MINIMUM OF .7 TO 1.0.
Inventors
- 👤 Raymond Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:49
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/911; Y10S210/912
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |