US3155454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of trace element cations
Assignee: WR Grace and Co
•
Filing: 1962-11-21
•
Granted: 1964-11-03
•
Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 Murrell L Salutsky
- 👤 Maria G Dunseth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:01
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/281; B; B01; B01J; B01J39/00; B01J39/02; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD FOR THE REMOVAL OF TRACE ELEMENT CATIONS FROM WATER CONTAINING THE SAME, SAID CATIONS BEING SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, BARIUM, CALCIUM, CADMINUM, CERIUM, COBALT, COPPER, IRON, LEAD, MANGANESE, NICKEL, SILVER, TIN, URANIUM, AND ZINC COMPRISING PRECOLATING SAID WATER THROUGH A BED OF MAGNESIUM AMMONIUM PHOSPHATE AND RECOVERING THE EFFLUENT.
Claim 2
Independent Claim
54 words
A METHOD FOR THE REMOVAL OF TRACE ELEMENT CATIONS FROM WATER CONTAINING THE SAME, SAID CATIONS BEING SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, BARIUM, CALCIUM, CADMINUM, CERIUM, COBALT, COPPER, IRON, LEAD, MANGANESE, NICKEL, SILVER, TIN, URANIUM, AND ZINC COMPRISING PRECOLATING SAID WATER THROUGH A BED OF MAGNESIUM AMMONIUM PHOSPHATE AND RECOVERING THE EFFLUENT.
References Cited (Backward Citations)
US2516659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |