Patent US4169824A successfully refreshed from Google Patents.
US4169824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Red mud treatment
Assignee: ChampionX LLC
•
Filing: 1978-06-05
•
Granted: 1979-10-02
•
Expires: 1998-06-05
Abstract
Abstract A method of fluidizing concentrated aqueous suspensions of red mud which comprises uniformly admixing with such suspensions at least 0.1 pound per metric ton of an acrylic acid polymer which has a molecular weight within the range of 5,000-30,000.
Inventors
- 👤 James Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:23
CPC Classifications
F; F17; F17D; F17D1/00; F17D1/08; F17D1/16; C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/06; C01F7/066; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C09; C09K; C09K23/00; C09K3/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
55 words
A method of fluidizing a flocculated red mud plastic mass which comprises uniformly admixing with the flocculated red mud plastic mass at least 0.10 pound per metric ton of an acrylic acid polymer as polymer based upon the dry weight of the red mud, said polymer having a molecular weight within the range of 5,000-30,000.
Claim 2
Independent Claim
55 words
A method of fluidizing a flocculated red mud plastic mass which comprises uniformly admixing with the flocculated red mud plastic mass at least 0.10 pound per metric ton of an acrylic acid polymer as polymer based upon the dry weight of the red mud, said polymer having a molecular weight within the range of 5,000-30,000.
Claim 3
Dependent Claim
17 words
The method of claim 1 where the acrylic acid polymer contains from 10-30% by weight of methylmethacrylate.
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) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |