US3790477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latices for sewage coagulation
Assignee: ChampionX LLC
•
Filing: 1972-02-02
•
Granted: 1974-02-05
•
Expires: 1992-02-02
Abstract
Abstract THICKENING OR DEWATERING SOLIDS FROM SEWAGE COMPRISINGING THE ADDITION OF AN AQUEOUS SOLUTION OF WATER-SOLUBLE VINYL ADDITION POLYMER MADE BY THE INVENTION OF A POLYMERIC LATEX.
Inventors
- 👤 R Nielsen
- 👤 W Busler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |