US3408289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for waste water renovation
Assignee: Fuller Co
•
Filing: 1965-09-01
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Granted: 1968-10-29
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Expires: 1985-09-01
Abstract
No abstract record available.
Inventors
- 👤 Hilding B Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:30
CPC Classifications
C; C02; C02F; C02F9/00; B; B01; B01J; B01J39/00; C02F1/00; C02F1/28; C02F1/283; C02F1/52; C02F1/5236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR WASTE WATER RENOVATION COMPRISING THE STEPS OF: (A) CLARIFYING THE EFFLUENT; (B) FILTERING THE CLARIFIED EFFLUENT TO REMOVE SUSPENDED MATTER; (C) PARTIALLY DEMINERALIZING THE CLARIFIED AND FILTERED EFFLUENT BY TREATING THE EFFLUENT WITH A CATION EXCHANGE MATERIAL;
Claim 2
Dependent Claim
40 words
A PROCESS FOR WASTE WATER RENOVATION COMPRISING THE STEPS OF: (A) CLARIFYING THE EFFLUENT; (B) FILTERING THE CLARIFIED EFFLUENT TO REMOVE SUSPENDED MATTER; (C) PARTIALLY DEMINERALIZING THE CLARIFIED AND FILTERED EFFLUENT BY TREATING THE EFFLUENT WITH A CATION EXCHANGE MATERIAL;
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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |