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US3259571A
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Method for removing iron from water
Assignee: Johns Manville Corp
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Filing: 1963-01-07
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Granted: 1966-07-05
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Expires: 1983-01-07
Abstract
No abstract record available.
Inventors
- 👤 William C Marshall
- 👤 George R Bell
- 👤 George J Coogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/58; C02F1/62; C02F1/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF CLARIFYING WATER, PARTICULARLY TO REMOVE SOLUBLE IRON, COMPRISING CONTINUALLY AND UNIFORMLY ADDING TO SAID WATER SOLID PARTICULATE BODY FEED COMPRISING POWEDERED ACTIVE MAGNESIUM OXIDE IN AN AMOUNT BETWEEN 2.5 AND 60 PARTS PER MILLION OF LIQUID TO BE FILTERED AND PULVERULENT FILER AID IN AN AMOUNT BETWEEN 5 AND 100 PARTS PER MILLION OF LIQUID TO BE FILTERED, MIXING AND RETAINING SAID WATER CONTAINING SAID ACTIVE MAGNESIUM OXIDE AND FILTER AID IN A RETENTION AREA TO INSURE UNIFORM DISTRIBUTION OF SAID SOILD PARTICLES AND TO AFFIX
Claim 2
Independent Claim
89 words
A METHOD OF CLARIFYING WATER, PARTICULARLY TO REMOVE SOLUBLE IRON, COMPRISING CONTINUALLY AND UNIFORMLY ADDING TO SAID WATER SOLID PARTICULATE BODY FEED COMPRISING POWEDERED ACTIVE MAGNESIUM OXIDE IN AN AMOUNT BETWEEN 2.5 AND 60 PARTS PER MILLION OF LIQUID TO BE FILTERED AND PULVERULENT FILER AID IN AN AMOUNT BETWEEN 5 AND 100 PARTS PER MILLION OF LIQUID TO BE FILTERED, MIXING AND RETAINING SAID WATER CONTAINING SAID ACTIVE MAGNESIUM OXIDE AND FILTER AID IN A RETENTION AREA TO INSURE UNIFORM DISTRIBUTION OF SAID SOILD PARTICLES AND TO AFFIX
References Cited (Backward Citations)
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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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |