US3578587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color removal process
Assignee: ChampionX LLC
•
Filing: 1970-01-05
•
Granted: 1971-05-11
•
Expires: 1990-01-05
Abstract
Abstract THE AMOUNT OF LIE NECESSARY TO REMOVE COLOR FROM PAPER MILL WASTE WATERS CAN BE SUSBTANTIALLY REDUCED WHEN THE LIME IS USED IN COMBINATION WITH CERTAIN WATER-SOLUBLE ANIONIC POLYMERS.
Inventors
- 👤 Frank N Kemmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:51
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/54; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 0
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |