US3349031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for removal of manganese from water
Assignee: Calgon Corp
•
Filing: 1965-08-20
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Granted: 1967-10-24
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 George B Hatch
- 👤 Elizabeth A Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:38
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/58; C02F1/62; C02F1/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD OF OXIDIZING SUBSTANTIALLY ALL MN++ IN WATER CONTAINING DISSOLVED OXYGEN AND HAVING A PH OF BETWEEN ABOUT 6 AND 7, COMPRISING ADDING A COMPOUND WHICH YIELDS BISULFITE ION IN SOLUTION IN AN AMOUNT IN P.P.M. DETERMINED BY THE EQUATION
Claim 2
Dependent Claim
58 words
A SOLID COMPOSITION USEFUL FOR PRECIPITATING MANGANESE FROM WATER CONTAINING MN++ CONSISTING ESSENTIALLY OF (A) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SOLUBLE SALTS OF IORN, COPPER, AND COBALT, AND (B) A COMPOUND WHICH YIELDS BISULFITE IONS IN SOLUTIONS WHERE THE RATIO OF THE IRON, COPPER, AND COBALT TO BISULFITE ION IS ABOUT 0.01:1 TO ABOUT 0.5:1.
References Cited (Backward Citations)
US2069621A
Cited
US2648440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |