US3171802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment
Assignee: General Services Co
•
Filing: 1962-11-14
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Granted: 1965-03-02
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Expires: 1982-11-14
Abstract
No abstract record available.
Inventors
- 👤 Archie H Rice
- 👤 Walter R Conley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/03; C; C02; C02F; C02F9/00; C02F1/00; C02F1/001; C02F1/004; C02F1/28; C02F1/283; C02F1/52; C02F1/5236; C02F1/5245; C02F1/54; C02F1/56; C02F1/66; C02F2101/00; C02F2101/30; C02F2101/301
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR TREATING SEWAGE WHICH COMPRISES ADDING A COAGULANT TO SUCH SEWAGE, ADDING A FILTER CONDITIONER TO SAID SEWAGE, PASSING SAID SEWAGE THROUGH A FIRST SEPARATION BED COMPRISING A LAYER OF RELATIVELY LARGE PARTICLES AND A DISCRETE LAYER OF SMALLER PARTICLES WITH SAID SEWAGE PASSING IN THE DIRECTION FROM SAID LARGE TO SAID SMALL PARTICLES, SAID LARGE PARTICLES BEING LESS THAN SIZE 6 U.S. MESH, ADDING ADDITIONAL FILTER CONDITIONER TO SAID SEWAGE EMERGING FROM SAID FIRST SEPARATION BED, PASSING SAID SEWAGE THROUGH A SECOND SEPARATION BED HAVING A LAYER OF LARGE PARTICLES AND A DISCRETE LAYER OF SMALLER PARTICLES WITH THE SEWAGE AGAIN FLOWING
Claim 2
Dependent Claim
105 words
A PROCESS FOR TREATING SEWAGE WHICH COMPRISES ADDING A COAGULANT TO SUCH SEWAGE, ADDING A FILTER CONDITIONER TO SAID SEWAGE, PASSING SAID SEWAGE THROUGH A FIRST SEPARATION BED COMPRISING A LAYER OF RELATIVELY LARGE PARTICLES AND A DISCRETE LAYER OF SMALLER PARTICLES WITH SAID SEWAGE PASSING IN THE DIRECTION FROM SAID LARGE TO SAID SMALL PARTICLES, SAID LARGE PARTICLES BEING LESS THAN SIZE 6 U.S. MESH, ADDING ADDITIONAL FILTER CONDITIONER TO SAID SEWAGE EMERGING FROM SAID FIRST SEPARATION BED, PASSING SAID SEWAGE THROUGH A SECOND SEPARATION BED HAVING A LAYER OF LARGE PARTICLES AND A DISCRETE LAYER OF SMALLER PARTICLES WITH THE SEWAGE AGAIN FLOWING
References Cited (Backward Citations)
US212023A
Cited
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 |