US3414513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating a digested diluted sewage slurry
Assignee: Hercules LLC
•
Filing: 1966-11-15
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Granted: 1968-12-03
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Expires: 1986-11-15
Abstract
No abstract record available.
Inventors
- 👤 Frank C Buhl
- 👤 Ronald D Lees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:00
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
PROCESS OF TREATING A DIGESTED DILUTED SEWAGE SLURRY WHICH COMPRISES CONTACTING SAID SEWAGE SLURRY WITH AN ACRYLAMIDE-BETA METHACRYLYLOXETHYLTRIMETHYLAMMONIUM METHYL SULFATE COPOLYMER, THEREBY (1) INCREASING THE RATE AT WHICH SUSPENDED SOLIDS FLOCCULATE AND SETTLE OUT OF SAID SEWAGE AND (2) INCREASING THE AMOUNT OF SUSPENDED SOLIDS WHICH FLOCCULATE AND SETTLE OUT.
Claim 2
Dependent Claim
50 words
PROCESS OF TREATING A DIGESTED DILUTED SEWAGE SLURRY WHICH COMPRISES CONTACTING SAID SEWAGE SLURRY WITH AN ACRYLAMIDE-BETA METHACRYLYLOXETHYLTRIMETHYLAMMONIUM METHYL SULFATE COPOLYMER, THEREBY (1) INCREASING THE RATE AT WHICH SUSPENDED SOLIDS FLOCCULATE AND SETTLE OUT OF SAID SEWAGE AND (2) INCREASING THE AMOUNT OF SUSPENDED SOLIDS WHICH FLOCCULATE AND SETTLE OUT.
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |