US3171803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing hardness from water
Assignee: General Services Co
•
Filing: 1963-08-13
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Granted: 1965-03-02
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Expires: 1983-08-13
Abstract
No abstract record available.
Inventors
- 👤 Archie H Rice
- 👤 Walter R Conley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:15
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/02; C02F5/06; C02F1/00; C02F1/001; C02F1/52; C02F1/5236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF REMOVING CALCIUM AND MAGNESIUM HARDNESS VALUES AND TURBIDITY FROM WATER WHICH COMPRISES THE STEP OF ADDING A REACTANT TO CONVERT SAID VALUES TO INSOLUBLE CALCIUM AND MAGNESIUM COMPOUNDS, ADDING AN INORGANIC FLOCCULANT TO SAID WATER AND SUBSTANTIALLY IMMEDIATELY THEREAFTER AND WITHOUT PRIOR REMOVAL OF RESULTING PRECIPITATES PASSING SAID WATER THROUGH A SEPARATION BED COMPRISING PARTICLES GRADING FROM COARSE TO FINE IN THE DIRECTION OF FLOW, SAID COARSE PARTICLES BEING BETWEEN 8 TO 20 MESH, SAID FINE PARTICLES BEING LESS THAN ABOUT 30 MESH.
Claim 2
Independent Claim
86 words
THE METHOD OF REMOVING CALCIUM AND MAGNESIUM HARDNESS VALUES AND TURBIDITY FROM WATER WHICH COMPRISES THE STEP OF ADDING A REACTANT TO CONVERT SAID VALUES TO INSOLUBLE CALCIUM AND MAGNESIUM COMPOUNDS, ADDING AN INORGANIC FLOCCULANT TO SAID WATER AND SUBSTANTIALLY IMMEDIATELY THEREAFTER AND WITHOUT PRIOR REMOVAL OF RESULTING PRECIPITATES PASSING SAID WATER THROUGH A SEPARATION BED COMPRISING PARTICLES GRADING FROM COARSE TO FINE IN THE DIRECTION OF FLOW, SAID COARSE PARTICLES BEING BETWEEN 8 TO 20 MESH, SAID FINE PARTICLES BEING LESS THAN ABOUT 30 MESH.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |