Patent US3426413A successfully refreshed from Google Patents.
Patent US3262877A successfully refreshed from Google Patents.
US3262877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treatment process
Assignee: Kimberly Clark Corp
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Filing: 1964-11-05
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Granted: 1966-07-26
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Expires: 1984-11-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Archie R Le Compte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:12
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A LIME TREATMENT PROCESS FOR WATER, WHICH WATER CONTANS BICARBONATE HARDNESS, THE IMPRIVEMENT WHICH COMPRISES THE STEP OF INTRODUCING TO THE WATER, PRIOR TO THE TREATMENT WITH LIME, SUBSTANTIALLY UNHYDRATED MAGNESIUM OXIDE OF A PARTICLE SIZE OF BETWEEN ABOUT 0.1 TO 1 MICRON WITH NO SIGNIFICANT QUANITY OF THE MAGNESIUM OXIDE EXCEEDING ABOUT ONE MICRON SO THAT THE MAGNESIUM OXIDE REACTS DIRECTLY AND WSSENTIALLY COMPLETELY WITH BICARBONATE HARDNESS (A) TO PROVIDE THE MAGNESIUM COMPONENT IN SOLUTION ESSENTIALLY AS MAGNESIUM CARBONATE AND (B) TO DECREASE THE BICARBONATE HARDNESS, AND ADDING TO THE WATER OF DECREASED BICARBONATE HARDNESS CONTAINING THE SOLUBLE MAGNESIUM COMPONENT LIME AT LEAST IN SUFFICIENT AMOUNT TO PRECIPITATE THE MAGNESIUM COMPONENT AS A COAGULANT, AND WHEREBY THE LIME REQUIREMENT FOR SOFTENING OF THE WATER IS REDUCED.
Claim 2
Dependent Claim
128 words
IN A LIME TREATMENT PROCESS FOR WATER, WHICH WATER CONTANS BICARBONATE HARDNESS, THE IMPRIVEMENT WHICH COMPRISES THE STEP OF INTRODUCING TO THE WATER, PRIOR TO THE TREATMENT WITH LIME, SUBSTANTIALLY UNHYDRATED MAGNESIUM OXIDE OF A PARTICLE SIZE OF BETWEEN ABOUT 0.1 TO 1 MICRON WITH NO SIGNIFICANT QUANITY OF THE MAGNESIUM OXIDE EXCEEDING ABOUT ONE MICRON SO THAT THE MAGNESIUM OXIDE REACTS DIRECTLY AND WSSENTIALLY COMPLETELY WITH BICARBONATE HARDNESS (A) TO PROVIDE THE MAGNESIUM COMPONENT IN SOLUTION ESSENTIALLY AS MAGNESIUM CARBONATE AND (B) TO DECREASE THE BICARBONATE HARDNESS, AND ADDING TO THE WATER OF DECREASED BICARBONATE HARDNESS CONTAINING THE SOLUBLE MAGNESIUM COMPONENT LIME AT LEAST IN SUFFICIENT AMOUNT TO PRECIPITATE THE MAGNESIUM COMPONENT AS A COAGULANT, AND WHEREBY THE LIME REQUIREMENT FOR SOFTENING OF THE WATER IS REDUCED.
References Cited (Backward Citations)
GB527153A
Cited
US2307466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |