US3227650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbidity and color removal by filter aid filters
Assignee: Johns Manville Corp
•
Filing: 1963-04-03
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Granted: 1966-01-04
•
Expires: 1983-04-03
Abstract
No abstract record available.
Inventors
- 👤 George R Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:49
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; B; B01; B01D; B01D21/00; B01D21/01; B01D37/00; B01D37/02; B01D37/03; B01J; B01J41/00; B01J41/04; B01J47/00; B01J47/011; C02F1/5236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF REMOVING IMPURITIES SUCH AS TURBIDITY AND COLOR FROM WATER COMPRISING FIRST ADDING UNDER RAPID AGITATION BETWEEN 10 AND 40 P.P.M. EACH OF FILTER AID PARTICLES AND FLOC FORMER, SAID FLOC FORMER BEING SELECTED FROM THE GROUP CONSISTING OF SALTS OF A TRIVALENT METAL, SALTS OF A TETRAVALENT METAL AND MIXTURES THEREOF, FORMING FLOC PARTICLES THEREIN, REDUCING THE AGITATION TO A LOW LEVEL BUT SUFFICIENT TO MAINTAIN THE FILTER AID AND FLOC IN SUSPENSION, THEN ADDING BETWEEN 0.001 AND 10.0 P.P.M. SYNTHETIC ORGANIC BRANCH CHAIN CATIONIC POLYELECTROLYTE TO THE SLOWLY AGITATED SUSPENSION OF THE PARTICLES AND CAUSING THE FLOC TO BECOME AFFIXED TO THE FILTER AID PARTICLES, WHEREBY THE IMPURITIES ARE INCORPORATED ALONG WITH THE FLOC, AND THEREAFTER PASSING THE FLOC-AFFIXED FILTER AID-CONTAINING WATER THROUGH A FILTER AID FILTER MEDIUM.
Claim 2
Independent Claim
132 words
A METHOD OF REMOVING IMPURITIES SUCH AS TURBIDITY AND COLOR FROM WATER COMPRISING FIRST ADDING UNDER RAPID AGITATION BETWEEN 10 AND 40 P.P.M. EACH OF FILTER AID PARTICLES AND FLOC FORMER, SAID FLOC FORMER BEING SELECTED FROM THE GROUP CONSISTING OF SALTS OF A TRIVALENT METAL, SALTS OF A TETRAVALENT METAL AND MIXTURES THEREOF, FORMING FLOC PARTICLES THEREIN, REDUCING THE AGITATION TO A LOW LEVEL BUT SUFFICIENT TO MAINTAIN THE FILTER AID AND FLOC IN SUSPENSION, THEN ADDING BETWEEN 0.001 AND 10.0 P.P.M. SYNTHETIC ORGANIC BRANCH CHAIN CATIONIC POLYELECTROLYTE TO THE SLOWLY AGITATED SUSPENSION OF THE PARTICLES AND CAUSING THE FLOC TO BECOME AFFIXED TO THE FILTER AID PARTICLES, WHEREBY THE IMPURITIES ARE INCORPORATED ALONG WITH THE FLOC, AND THEREAFTER PASSING THE FLOC-AFFIXED FILTER AID-CONTAINING WATER THROUGH A FILTER AID FILTER MEDIUM.
References Cited (Backward Citations)
CA607440A
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US2236930A
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US2468189A
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US2995512A
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US2764512A
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US2941942A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |