US3654151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflocculation of solid materials in aqueous medium
Assignee: Monsanto Co
•
Filing: 1970-04-13
•
Granted: 1972-04-04
•
Expires: 1990-04-13
Abstract
Abstract ETHANE DIPHOPHAONATES HAVING THE FORMULA (R3-O-)2-P(=O)-C(-R2)(-CHN-R1)-P(=O)(-O-R3)2 WHEREI R1 AND R2 ARE HEREINAFTER DEFINED AND R3 IS HYDROGEN OR A METAL ION AND N IS AN INTEGER HAVING A VALUE OF 1 OR 2, ARE DISCLOSED AS DEFLOCCULATING AGENTS IN AQUEOUS VEHICLES OR SYSTEMS CONTAINING FINELY DIVIDED SOLID MATERIALS SUCH AS OIL WELL DIRILLING MUDS.
Inventors
- 👤 Thomas M King
- 👤 Howard L Vandersall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:57
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305; B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0034; C04B7/00; C04B7/36; C04B7/38; C04B7/42; C04B7/428; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/06; Y10S516/07; Y10S516/905; Y10S516/907; Y10S516/908
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |