US3657134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflocculation of solid materials in aqueous medium
Assignee: Monsanto Co
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Filing: 1970-04-13
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Granted: 1972-04-18
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Expires: 1990-04-13
Abstract
Abstract EPOXY ETHANE POLYPHOSPHONATES HAVING THE FORMULA 2-X,2-Y,3,3-DI((R3-O-)2-P(=O)-)OXIRANE WHEREIN X AND Y ARE HEREINAFTER DEFINED AND R IS HYDROGEN OR A METAL ION, ARE DISCLOSED AS DEFLOCCULATING AGENTS IN AQUEOUS VEHICLES OR SYSTEMS CONTAINING FINELY DIVIDED SOLID MATERIALS SUCH AS OIL WELL DRILLING MUDS.
Inventors
- 👤 Thomas M King
- 👤 Howard L Vandersall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:32
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C04; C04B; C04B7/00; C04B7/36; C04B7/38; C04B7/42; C04B7/428; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06; Y10S516/07; Y10S516/905; Y10S516/907
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |