US3171801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for clarifying water
Assignee: General Services Co
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Filing: 1962-10-29
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Granted: 1965-03-02
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 Archie H Rice
- 👤 Walter R Conley
- 👤 Russell L Culp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:29
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; B; B01; B01D; B01D37/00; B01D37/02; C02F1/5236; C02F1/5272
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF REMOVING SUSPENDED MATTER FROM WATER WHICH COMPRISES THE STEPS OF (1) PROVIDING TWO FILTER BEDS EACH CONSISTING OF A LAYER OF FINE FILTER MEDIA OF LESS THAN 18 MESH AND A LAYER OF COARSER FILTER MEDIA OF LESS THAN 8 MESH, (2) ADDING TO THE WATER TO BE TREATED A COAGULANT, (3) ADDING TO THE WATER TO BE TREATED A FILTER CONDITIONER, (4) PASSING SAID WATER THROUGH ONE OF SAID FILTERS IN THE DIRECTION FROM SAID COARSER TO SAID FINE MEDIA, (5) ADDING SOLELY ADDITIONAL FILTER CONDITIONER WITHOUT ADDING ADDITIONAL COAGULANT TO SAID WATER DISCHARGING FROM SAID ONE FILTER, AND (6) PASSING SAID WATER THROUGH THE OTHER OF SAID FILTERS IN THE DIRECTION FROM SAID COARSER TO FINE MEDIA.
Claim 2
Independent Claim
122 words
THE METHOD OF REMOVING SUSPENDED MATTER FROM WATER WHICH COMPRISES THE STEPS OF (1) PROVIDING TWO FILTER BEDS EACH CONSISTING OF A LAYER OF FINE FILTER MEDIA OF LESS THAN 18 MESH AND A LAYER OF COARSER FILTER MEDIA OF LESS THAN 8 MESH, (2) ADDING TO THE WATER TO BE TREATED A COAGULANT, (3) ADDING TO THE WATER TO BE TREATED A FILTER CONDITIONER, (4) PASSING SAID WATER THROUGH ONE OF SAID FILTERS IN THE DIRECTION FROM SAID COARSER TO SAID FINE MEDIA, (5) ADDING SOLELY ADDITIONAL FILTER CONDITIONER WITHOUT ADDING ADDITIONAL COAGULANT TO SAID WATER DISCHARGING FROM SAID ONE FILTER, AND (6) PASSING SAID WATER THROUGH THE OTHER OF SAID FILTERS IN THE DIRECTION FROM SAID COARSER TO FINE MEDIA.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |