US3414514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dewatering a concentrated sewage slurry
Assignee: Hercules LLC
•
Filing: 1966-11-15
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Granted: 1968-12-03
•
Expires: 1986-11-15
Abstract
No abstract record available.
Inventors
- 👤 Frank C Buhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:43
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
PROCESS OF DEWATERING A CONCENTRATED SEWAGE SLURRY WHICH COMPRISES CONTACTING SAID SEWAGE SLURRY WITH AN ACRYLAMIDE-BETA METHACRYLYLOXYETHYLTRIMETHYLAMMONIUM METHYL SULFATE COPOLYMER, AND THEN DEWATERING SAID RESLUTING SLURRY.
Claim 2
Dependent Claim
26 words
PROCESS OF DEWATERING A CONCENTRATED SEWAGE SLURRY WHICH COMPRISES CONTACTING SAID SEWAGE SLURRY WITH AN ACRYLAMIDE-BETA METHACRYLYLOXYETHYLTRIMETHYLAMMONIUM METHYL SULFATE COPOLYMER, AND THEN DEWATERING SAID RESLUTING SLURRY.
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 |