US3759729A
Expired / Lapsed
US
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Clay mineral bearing suspensions
Assignee: Sued Chemie AG
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Filing: 1971-10-18
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Granted: 1973-09-18
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Expires: 1991-10-18
Abstract
Abstract CLAY-MINERAL-BEARING SUSPENSION, E.G., OF BENTONITE, OF HIGHLY INCREASED VISCOSITY ARE PROVIDED BY ADDING THERETO, AS BINDING VISCOUS CLAY-MINERAL-BEARING SUSPENSION CONTAINNG, AS A BINDING AGENT, A WATER-SOLUBLE POLYETHYLENE OXIDE WITH A MOLECULAR WEIGHT OF FROM ABOUT 300,000 TO MORE THAN ABOUT 5,000,000, IN AMOUNTS OF FROM 0.02 TO 0.5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE DRY CLAY MINERAL.
Inventors
- 👤 R Fahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:16
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; B; B01; B01J; B01J13/00; B01J13/0073; B01J13/0082; C08; C08K; C08K3/00; C08K3/34; C08K3/346; Y; Y10; Y10S; Y10S106/00; Y10S106/04
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |