US3350304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treatment compositions and processes
Assignee: Hunnewell Soap Co
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Filing: 1965-02-18
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Granted: 1967-10-31
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Expires: 1985-02-18
Abstract
No abstract record available.
Inventors
- 👤 Oliver M Bacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:15
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/5263
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A METHOD OF TREATING A WATER OF LOW HARDNESS TO CLARIFY IT AND RENDER IT STABLE AND POTABLE, WHICH COMPRISES TREATING SAID WATER WITH FROM 5 TO 20 P.P.M. ALUM, 20 TO 100 P.P.M. LIME AND 2 TO 10 P.P.M. OF A COMPOSITION COMPRISING 10 TO 50 PARTS PYROPHYLLITE ACIDULATED AND NEUTRALIZED, 50 TO 125 PARTS ALKALI METAL ALUMINATE, 15 TO 48 PARTS NON-EXPANDING CLAY, 1.5 TO 15 PARTS POLYVALENT METAL SULFATE AND 0.5 TO 1.5 PARTS OF ORGANIC GUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |